Moritheil/Autumn - Sorry to hear that. Have fun, and seeya later.
Darimaus - I don't think Pseudodragons can manipulate weaposn with their claws, but I had thought that's why you were using the "gloves of Man".
Voidrazor - Lesser Voidmind would be acceptable as a +2 LA, to get it to +1, you'd have to drop a couple things... I mean, the SR and Immunities alone are worth 1 LA, even with the drawbacks. The +4 nat armour, bonus feat, and Stat mods are another 1 LA
Also be warned that there may be some... Imperial... er, I mean Illithid entanglements during the campaign.
No Fiend of Possession.
Shayuri -I'm rather partial to those, the Dragon Ascendant in particular (The Sea was a 40HD Silver Dragon With 12 lvls in Dragon Ascendant)
Solarius - Anything can be a pain depending on how it's used, but the Void Incarnate is just naturally painful to DM. By lvl 10, they've got Improved Easion & Mettle(Fort/Will). With a good Reflex save (And Dextrous fort/will), this makes them essentially immune to anything that allows a save.
Add that to their existing immunity to force effects, mind affects, and divinations, as well as their Freedom of Movement(Immunity to grapples) and Void Presence. THEN, take into account that all of these powers are EXTRAORDINARY!
Definitely NOT Underpowered. I call them the "can't touch this" class. Not too much on the offense, but with the sneak attack 1/round, just pump your rogue levels non-epic, Dual-wield Keen Kukri's, and get something that lets you sneak attack & Crit constructs/undead.
[sblock=rant]Worst I ever saw, though, was a guy who combined them with Kensai, and one other "secret ingredient". The end result was that he could make a concentration Check (Very easy to pump) vs anything that allowed a save, and if he made it, nothing happened.
If he'd had more levels he would've added legendary dreadnought for the 'unstoppable' part, which then allows you to make a save (at +20) vs something that doesn't NORMALLY allow a save.[sblock]
BTW, heres another point I've been looking for but haven't found yet. Do you allow the switching of item slots/combining items at the appropriate costs? As well, do you allow things like skill boosting items, or are you altogether banning the Item Creation Chart?
Yes I allow switching Item slots and combining items, though keep in mind the +50% cost.
As for the item creation chart, it's a no-go, except for Skill Boosters. All skill boosters must either be in an appropriate slot, or cost extra (I consider Rings as appropriate for any skill booster). Max +40 item, and after +20 they're considered epic (X10 cost).