Sorry dude, i mean no offense but in normal difficulty, both heroic and epic, you can slaughter entire quests naked with just a pointy stick. In my opinion it's not really a good way to measure a class.
I'll add another reference: i soloed A Cry for Help EE with a pure 20 Warlock, SWF line + orb melee, Improved Crit, Overwhelming Crit and some Metamagics. Lv28 and ubergeared. ED was Divine Crusader, twists were Double Rainbow, Prism, and probably Cocoon, or maybe Brace (or maybe light spellpower? idk). Also first life, PdK CHA based.
A few considerations: Cleaves are useless because of your bursts, so Legendary Dreadnought is out. You do not have uber attacks nor can reach uber damage scores so adrenalines and Fury are out as well. Grandmaster is out too, since you can't be centered. Fatesinger, let's face it, is a joke, except maybe for Fey Pact (nah, who am i kidding?). That leaves only Divine Crusader as a viable melee option (which is a very good ED, at least). And, in my opinion, right now Shiradi twist are the best option for damage. Honestly, i kind of like the novelty of this, but that also tells how ****ed up this is.
Back to my testing, the quest was a challenge, expecially staying alive. Consecration is an absolute must. Without that, you die, point, and go home. At least you can always twist it. Damage wise it was not THAT bad. But i REALLY hate how the bursts completely halts your attack progression. You're meleeing, then you burst, and then even if you're holding left mouse you stand still doing nothing. Please change that. This is a melee tree, anything that blocks melee is not welcome.
Ah, for reference, i had next to no problems in the same quest with my lv23-ish Paladin. Granted, 3rd+ lifers and yadda yadda, but still...
So, a few more points:
- Edrein is right when suggesting more HP bonuses in the tree. At lv28, in Divine Crusader, with top gear and +4 tome, i was reaching 700hps (with points only in CHA, of course) . Not a single more point. That's simply not enough. If those were 800 i probably wouldn't be here complaining.
- The Light damage bonuses in the tree are a joke. I can understand if you want to keep the tier 4 (Retribution) low (even though i'd suggest to double it), but the capstone? Come on! A capstone means the toon has 20 Warlock levels, and a full investment in this tree. There's no room for broken combinations. 3d6 here are a total joke. Make them 6d6. At least.
- Resist Energy is in touch with the flavor of the tree, but it kinda feels like a wasted slot. We have already a gazillion ways to have it (Spell, pots, wands, items, guild buffs)
- Displacement is good, but i would actually make it a toggle, like Tenser from Eldritch Knight (why not learn from one of the few good things in that tree?)
- Summons enhancements are totally out of place. I mean, i know you want to buff them and make them somewhat viable, but honestly they are a waste of space in the tree, that could be used for something more interesting. No one's gonna use them, if not for da lulz, i guarantee it. Expecially not the T5. A t5 summon related? Seriously? (Side note: a good topping on a disgusting food is not gonna redeem it. The food will taste like **** anyway.)
- Make the aura tick every 2 seconds from the start. Flat. 2 secs are barely enough, and i should wait 'till lv18 for that? You must be joking. Except you're not very good at it.
- Spellpower tax is huge in this tree. You need to have high spellpower in Force for the base EB, then in the Element of your Pact, then Light. On top of melee. I'm not saying that it can't be done (far from that), but that it's taxing. So please make it worthwhile to do so.
- Your defenses are meager. With medium armor PRR and MRR are where they should be, but HPs are not.
- Weapon proficiency should come earlier. Second core, maybe. Three levels of Master's Touch i can cope with. Not TWELVE.
- The Bursts are currently affected by Metamagics, or at least you can right click select them. But they do not seem to affect them. Quicken does nothing, while a quicker burst would surely be nice, if that means not interrupting the attack chain all together. Empower and Maximize are simply NEEDED on them. On any melee, i can cleave for hundreds, thousands of damage. On a burst i get 3/10d6 Light + 10d6 Eldritch Blast + 10d4 Acid/Fire/Sonic (that save for half, let us not forget that. More dices if points are spent in the other tree.). Melee i just need a stat to pump and melee power, voila 1k+ crit at worst. Here i need 3 different spellpowers and i have a low crit chance. The 2 bursts right now are decent, tops. Make metas properly work on them, and maybe they'll be good.
- As of now, there's no reason to spend more than 1 point in Cure Moderate SLA. Please keep it at 0 sp, or 1 at max. Make it just 1 Rank, and make it cost 2 AP. Done.