DrSpunj said:
I'll post here and let you know how the session goes.
I just wanted to post the results of the combat. Mr. "You can't hit me!" wasn't overly effective...in any party role. His 20' base speed meant he was one of the last to engage the enemy in both battles, and hit low hit points meant that the area effect attacks and/or indirect damage he took from other things really hurt.
This was a group of four PCs, all 12th level. This was an "even fight" against first a single enemy and then against a party of four creatures. Four 12th level PCs have a CR of 16, so I threw them up against CR 15 & 16 encounters, both pulled from the Fiend Folio.
The first was a Hullathoin. Huge, intelligent, Undead monstrosity--big grappler, poison, lots of melee attacks for good damage. It's ace in the hole? Bloodfiend Locust Swarm! As a Standard Action it could shake off a swarm of these Energy Draining beasties and send them after someone. Now, the book doesn't put any limit on this, either number per day or how many at a time, but this swarm is a CR 8 all by itself so I ran it with a self-imposed limit of no more than 1 swarm out there at a time.
Once the Hullathoin realized it couldn't hit
Videssian's PC with any melee attacks it shivered off a swarm and sent it after him, then went back to pummeling the other PCs. 3d6 plus Energy Drain automatically every round quickly took its toll on him.

He couldn't outrun the swarm with his low base speed and his 3 companions were focusing all their efforts on the Hullathoin. After he'd lost 8 levels to the bugs they finally dropped the Hullathoin and won the battle.
The second combat was against a group of 4 Maugs (Large Constructs), each with grafts and class levels. They were up against Blaster (Magister), Basher (Fighter with roller graft), Spitter (Archer with stone spitter graft) and Patch (pacifistic greenbond-type who had a lot of mind-controlling effects).
With his poor Fortitude & Will saves he took quite a bit of magical damage and was affected by several of Patch's mind-affecting enchantments. He even failed a couple of Reflex rolls (got trapped inside a Lesser Resilient Sphere on the 2nd or 3rd round of combat! Luckily their Magister was able to dispel that a round or two later) so Evasion couldn't help him out (and he hadn't taken Improved Evasion). Once Basher realized he couldn't hit him he started just rolling over him doing some fair damage each time he failed the Reflex roll (which was far more likely statiscally than getting the 20 Basher needed to hit him with a normal melee attack). An early Stone Spikes spell slowed him down even more and did additional damage. He ended up sucking down a number of Cure potions throughout the battle, and even then I think he was the first of the party to fall.
Now, I chose both of those opposing combatants a full two days before any of the players had submitted their PCs to me for approval, and there are a number of potential opponents where his build would have stopped them cold. I was just glad to see that his min/maxing the Classless Generator system I've been working on didn't really break anything. Was he nearly impossible to hit? Absolutely. Did it matter? Not really.
Any thoughts, questions or comments on this experience? Or the most recent updated Feats Cheat Sheet? If so, please post!
Thanks.
DrSpunj