I have similar ambitions for my next life. I intend to spend a lot of time doing this particular TR, intending to slowly solo every last quest at length till I learn them. While I am not adverse to having a cleric hireling with me (I actually intend to have one), I want for the character to have alternate means of healing in case that goes awry. The ability to handle traps is paramount for me, but so too is the need to be able to handle boss fights in melee range. The ability to engage from range however is also crucial for tactical reasons like pulling, archer ambushes and boss softening. Also utterly crucial is that the build plan be fun to play and able to do everything needed at every level during the leveling process. This is NOT intended to be a leveling plan for some uber epic build that only really shines when the plan is complete.
The choice frankly is obvious to me, with EllisDee's
Tempest Trapmonkey for new players being the published variant that is closest to my needs. Personally though I feel it is perhaps not ideal given that I am in most solo circumstances willing to have a hireling, and so going for 18 levels of ranger so as to get a piddling few extra spell points and Cure Serious Wounds is a huge sacrifice for little gain. Also, if you can come up with a +2 intelligence tome by level 12, you can keep the essential trapping skills maxed even with just the paltry skill points of a fighter (if playing human).
A plan I might suggest for a 34 point build would be as follows:
Human
Str 18
Dex 14
Con 14
Int 14
Wis 8
Char 8
All leveling stat points go to strength.
1 Rogue, Power Attack, Cleave
2 Ranger, Favored Enemy: Undead
3 Ranger, Point Blank Shot
4 Ranger
5 Ranger
6 Ranger, Great Cleave, Favored Enemy:Giants
7 Ranger
8 Ranger
9 Ranger, Improved Critical (favorite melee weapon type)
10 Ranger
11 Ranger, Favored Enemy: Evil Outsider
12 Ranger, Improved Critical (Ranged)
13 Fighter, Dodge
14 Fighter, Power Critical
15 Fighter, Weapon Focus (favorite weapon type)
16 Fighter, Weapon Specialization (favorite weapon type)
17 Fighter
18 Fighter, Toughness, Precision
19 Fighter
20 Fighter, Greater Weapon Focus (favorite weapon type)
This allows you to develop the full panoply of rogue and stealth skills up to level 12 whereupon you will have gotten all the two weapon fighting feats for free from ranger, and maintain trapping skills after. Going eight levels of fighter at the end gives you the option of going to the tier five rank of kensei at that point should you choose, in addition to whatever cool ranger stuff you've picked up by then. If you want to keep stealth skills maximized as well, forgo tier five kensei and mix in a couple or more of extra rogue levels (which would also give you extra sneak attack dice). Any other class really could be developed in these last eight levels (like a total of 5 levels of rogue and 3 levels of paladin, plus 1 extra level of ranger for optimum save throws, dropping starting strength down to 16 and buying charisma to 14).
For maximum effect (till they plug the bug), stay with your current ranger life just long enough to earn three levels in epic destinies, most specifically at least one in Primal Avatar, picking up Rejuvenation Cocoon. You will have earned a fate point allowing you to twist in one tier one epic talent, which you ought make that Rejuvenation Cocoon. The spell points gotten from ranger will go far if being used for heals with Rejuvenation Cocoon.
Check out the enhancement plan from Tempest Trapmonkey for some very interesting ideas. Of course if one goes for tier five kensei, one would have to cherry pick from the Tempest Trapmonkey enhancement plan. It is also perfectly feasible to stay with the Tempest Trapmonkey enhancement plan identically, and none the less level up in fighter for the extra HP and feats. The original Tempest Trapmonkey plan takes the extremely nice "Evasive Dance" tier five ability in tempest.