I wouldn't consider Weapon Focus really necessary for, well, anything. Unless it's a prereq somewhere in Warpriest. Ditto for Toughness these days, at cap it's a mere 30hp.
I thought weapon focus was a prereq for improved critical, but I'll double check that.
edit2- you're right. It's needed for power critical, but not improved critical
Weapon Finesse isn't needed since Ninja Spy 's first core ability is basically Weapon Finesse for Short Swords, as well as remaining centered while using them.
That's a little different from how I read it. The text was "use shortswords while centered". In other words, the weapon won't screw you up if you're already centered. Since I intend to wear armor of some sort, I won't be centered, right? Thus, that enhancement actually gives me nothing (other than a stepping stone to other stuff on the tree). I actually thought I was golden for exactly what you point out, but after that closer read, I scrapped what I had in order to put finesse back in. If I'm off-base, please speak up because I'd love to get that feat slot back.
Dodge can be taken as a Monk bonus feat, if you want it on your second Monk level, IIRC.
Both of the feats I took at 3 are eligible for the monk bonus feat slot. Remember, I went monk/FvS/monk/Fvsx17 in order to get cure light wounds a little sooner.
Since you don't plan on doing any offensive casting to speak of, why did you pump WIS? On a Favored soul, WIS affects DCs, but CHA spell points and is needed at a minimum of 19 to make sure you can cast all spell levels.
Honestly, I had 4 points left, DEX and CON were going to take 3 just to get odd. I got to thinking some of the monk stuff would be helped with better WIS so I dropped a couple points in there and then had no idea what to do with the last 2 so I just said screw it and dropped them in WIS as well. Not exactly a well-considered plan…
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edit- the enhancements probably don't work right. I remember seeing lots of bug entries for the planner related to the warpriest tree. I'll probably have to clean up a few things there, but the general approach probably won't change much.
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edit3- using the wiki as the guide, here's the summary of enhancements, which isn't quite the same as the planner build (the only one I was forced to take was acrobat1 and 2 in ninja spy to get to tier 2)
Drow: Core 1-4 (SR, DEX, SR, CHR); weapon tier 1-4; ambidex 3 ranks
Ninja Spy: Core 1; sneak attack tier 1-2; acrobat 2 ranks; subtle 3 ranks
Shintao: Core 1; deft strikes 3 ranks; iron skin 3 ranks
Warpriest: Core 1-5; toughness 3 ranks; sacred touch 3 ranks; weapon tier 1-5; wall of steel 3 ranks; inflame 3 ranks; inflame-saves 3 ranks; inflame-energy 2 ranks; CHR; CHR; divine power
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edit 4- so assuming I skip armor and run around in a dress (aka stay centered), I re-did the feats. I probably won't bother putting this in the planner since the work's already done. Feats, in order:
toughness, 2WF / combat casting, dodge / empower healing / imp2WF / imp crit pierce / quicken / gr2WF