alright, the new inquisitive tree is live, and seem to be viable with a lot of builds styles, so lets take a knack at it.
of note:
-crossbow do not have an innate stat check for damage, so any class, race, enhancement that give this is a priority
-focusing on the fusillade/no hold barrel aspect mean you will have to either sacrifice all other tier V abilities, or spash 4 lvl arti and lose 30% ranged alacrity
-Diplomacy is a secondary, but not unimportant aspect of the inquisitive tree.
source of stat to attack and dmg:
- Falconry tree get you WIS for attack at tier II, WIS for damage at tier III
- Harper tree get you INT for attack at tier I, INT for damage at tier III
- Artificer lvl 2 spell (at lvl 3) get you INT for attack, and lvl 3 spell (at lvl 6) get you INT for damage, but can only apply 1 at a time
- Favored Soul level 2 feat let you use either CHA or WIS for attack and damage IF you also have the inquisitive favored weapon enhancement AND have more than half your heroic level as a FVS
- Rogue Mechanic 3rd core (lvl 6) get you INT for damage with crossbows
- Wizard eldritch knight tier III get you INT for attack, but not damage
- Sorcerer eldritch Knight tier III get you CHA for attack, but not damage.
Class breakdown:
- Artificer: great synergy, extra action boost, the ability to get either INT for attack or damage via spells mean you only need Harper tier I to complement the dmg spell, or splash rogue 6 to complement the attack spell, getting fusillade can be a way to skip tier V from the inquisitive tree, but you lose the 30% alacrity. and rune arms add imbue damage. Diplomacy is not a class skill.
- Barbarian: bad synergy, Occult slayer help with survivability, and the Frienzied extra action boost are the only redeeming grace, and requires you to get a stat to damage elsewhere. better used as a splash only
- Bard: good synergy, can make crossbow a swashbuckling weapon, and benefit from SOME abilites related to swashbuckling, CHA focus and has diplomacy as a class skill, but you need to focus on getting stat to dmg elsewhere.
- Cleric: good synergy, can use a domain to boost damage, has diplomacy as a class skills, can use cleric spells, and has diplomacy as a class skill, great paired with Falconry to get WIS for attack and damage
- Druid: good Synergy, Access to Druid spells, mostly limited to Season's Herald. beguile can quickly rack up and help weaken mobs, can be WIS focused with falconry and still retain great casting capacities, also having a pet on the side or summon help when diplomacy kick of, that is until it dies. Diplomacy is a class skill. need Falconry for WIS to attack and damage.
- Favored Soul: great synergy, with the ability to use favored soul spells, diplomacy as a class skill, AND use CHA for attack and damage with the inquisitive ability that make crossbow a favored weapon, but you do not get extra damage from feats related to favored weapons, to verify but you dont seem to be getting extra damage either from the enhancment tree related to favored weapons.
- Fighter: great synergy, extra damage from weapon focus, extra damage from specialization feats, extra action boosts is important, haste action boost as a backup to no hold barrels, but diplomacy is not a class skill, and you need to get stat to dmg elsewhere
- Monk: terrible synergy, do NOT use unless you want the monk past life and hate playing a monk. (at least diplomacy is a class skill)
- Paladin: bad synergy, no real way to boost weapon damage, sturdier than some classes, diplomacy is a class skill, but paladin got too little points, need to get stat to dmg elsewhere.
- Ranger: average synergy, can only use deepwood stalker, various additional attacks (sniper shot/aimed shot/merciful shot/leg shot), Killer to get +20% doubleshot if you can sustain it, favored enemies can make it easier to deal with certain mobs. higher range for point blank, Diplomacy is not a class skill and you need to get stat to damage elsewhere
- Rogue: great synergy, mechanic core get you the INT for damage, various boost to crossbow damage, sneak attack damage, fletching, two extra attacks (wracking shot/leg shot) and if you splash artificer4 you can use the arti fusillade instead and go tier 5 mech. Diplomacy is a class skill, and you only need to get INT for attack from harper tier I or arti spell, or have enough DEX to make it less important.
- Sorcerer: bad synergy, you have access to sorcerer spells, Eldritch Knight spellsword toggle add some damage. Diplomacy is not a class skill and you can only get CHA for attack, not damage. Not recommended unless the main class is favored soul and for some reason you want to splash into sorcerer.
- Warlock: bad synergy, stuck to aura lock, extra damage to those that get near, extra light dmg to attacks, and the aura can get you temp HP to help stay alive. Diplomacy is not a class skill, and need to get stat for damage elsewhere. only recommended as a splash4
- Wizard: good synergy, you have access to Wizard spells, Eldritch Knight spellsword toggle add some damage. Diplomacy is not a class skill and you can only get INT for attack, complement this with either harper tier III or arti6 splash for spell
races:
Aasimar: great with builds using WIS and falconry, good source of self heal.
Dragonborn: +3 action boost is very useful, memory of flight is always fun
Drow: great with any build using CHA or INT, venomed blade can add extra damage
Dwarf: extra HP, but a CHA penalty :/
Elf/Wood elf: extra range for point blank, could work paired with deepwood stalker and Falconry
gnome: great for INT builds, and can give extra damage to light crossbows
half-elf: great for anyone wanting to make the best use of diplomacy, half-elf give an extra 10 diplomacy when using inquisitive, the dilettante can help covoer holes like helping you use raise scrolls
half-orc: while the penalty to INT or CHA hurt certain builds, the +3 extra Action boost can greatly make up for it
halfling: extra sneak attack damage, best paired with rogue along deception items
tiefling: weapons deal extra fire damage, the obscuring darkness can help fighting standing still...
Warforged: construct natural resistance, +15 ranged power
Bladeforged: construct natural resistance, self heals spell (need mana), weapon attachment
Morninglord: extra INT, extend point blank range, emergency heal
Purple Dragon Knight: speed action boost, emergency self heal, greater heroism
Scoundrel: weapons extra sonic damage, extra damage to light crossbow, hellish rebuke and obscuring darkness can be interesting, best paired with a bard.
Scourge: great with builds using WIS and falconry, good source of self heal.
Shadar-Kai: great for INT builds and rogues, ghostly essence is good
Svirfneblin: great for INT builds, and can give extra damage to light crossbows
Inquisitive tree is great for many builds, and is good enough to carry even bad builds to 20, useful to farm racial or class PL without changing gear. it will certainly help streamline my TR train.
Inquisitive also benefit greatly from various splashes, for examply you can combo rune arm with bard swashbuckling.