Jiyva will continue to exist long enough to punish you anyway. It is a little silly that Dissolution doesn't keep Jiyva alive. Personally I find the idea that the god ceases to exist when you kill the royal jelly a little silly anyway, but then, we are talking about a god of amorphous jelly monsters...
TSO is probably the best late game god, seeing as how extended is almost all unholy monsters, you get incredible healing and MP regen on kills, and somewhat useful abillities, if you feel like training invocations. Plus he'll turn a weapon into a Holy wrath weapon, meaning you are even more able to murderize the various unholy monsters throughout extended.
If you are unable or unwilling to use TSO (maybe you're a demonspawn, or want to use necromancy spells, or whatever) then Mahkleb is a decent option. If you can't tell, I really like having HP regen on kills...
Trog wrath is tough, you really want to be able to blink before abandoning trog, as being surrounded by berserking giants is really bad. Still, trog is a decent god even in extended, his summons are really nice, and hand of trog is useful. Berserk has its moments even in extended, but obviously it's pretty dangerous, you don't want to find yourself slowed with a bunch of tough enemies around.
The new wrath mechanics mean you get wrath when gaining XP, so typically immediately after, or even during a big fight, you'll get a bunch of berserk giants dropped on you. So it's probably a good idea to go somewhere relatively easy and work off the wrath, if possible. Tomb might be one of the worst places to work off wrath, you don't want to be at 10% hp after eating a bunch of torments, only to have to fight a pile of dangerous monsters.
The nice thing about being a human is the fast XP gain, meaning you are higher level than any other race would be throughout most of the game, meaning you have more HPs, MPs, and spell levels. This is significant! However the 0 apts aren't terribly great, nor are they bad. Humans are nice for being able to adapt to what they find. I do find them a bit boring though.
Throwing is an awesome skill, I'd use that over bows, crossbows, or slings any time. It works kinda like Unarmed combat now, where your base damage is determined by your skill. Meaning with 27 throwing, you're doing something like 27 + thrown weapon damage. Stones are special cased to use 1/2 of your throwing skill, but with high throwing skill, even tomahawks are devastating, plus you don't have to deal with swapping to your launcher. I find it hard to justify using any other ranged skill anymore, although I haven't seen the numbers for all the ranged skills at various levels, so it's quite possible that at skill 14, for example, a longbow beats out a javelin.