How about expanding the wish shard feat options to purchase stats? At the moment you can only get +6 STR if you have 13 levels in three fighter classes, or +6 WIS if you have 20 levels of 3 divine caster classes. Maybe tune that to include more classes of lower levels, so builds consisting of 3 or 4 classes are viable. You could balance this with ER requirements for the feat availability.
Also, I know I'm new, and I'm not criticising the game or the server or anything (and granted I am aware that this may not be the case end game), but I'm struggling in the spell-casting department on any character. I find that casting any damage spell tends to do far less damage than beating on the same enemy with anything melee does in the same amount of time. And that is before taking into consideration that the spell is very likely to get resisted, and the downside of having finite spells per day to cast and whatnot (stuff that was balanced out in general D&D by the fact that having an exploding meteor thrown at you hurt significantly more than getting stabbed).
I understand that this is my experience as an ER1 player, I have nowhere near reached the end game, and I very likely have a very narrow pool of experience in that department, but it just feels like this is the general consensus amongst the players - in that STR based melee builds are superior, and gishes are "meant" to be melee swordsmen using spells primarily for buffs. There just feels to be introduced limitations on what type of 'build' are playable and so far from what everyone tells me, this is what the late game is too.
Again not criticising, it's a great server, I absolutely enjoy my time in Trinity, wouldn't swap it for anything, understand I'm nowhere near the end game, and merely giving feedback on my first impressions and opinion based on my own gameplay and the classes I see played. Just that maybe this is also relevant to more builds being viable / playable / enjoyable...