You
definitely need to upgrade your alchemist gems. Your bomb damage scales with gem tier. You're still using
tier 1 bombs. In dreadfell. If you upgrade to tier 3 or tier 4 alchie gems (you've got several tier four gems, so you're good there), you will see a
massive increase in bomb damage. It will be like night and day, heh. I'd probably guess your bombs are doing about half the damage they should be doing at this point... maybe less. You'll see once you convert some of the rubies or whatev' into alchie gems and start nuking everything to dust.
Kit's fine. Defensive posture is kinda' useless*** IMO -- maxing out staff mastery for bigger channels usually helps me out more (offense is your defense, etc.). Few more points into golem resilience would be helpful, especially on that fragile golem end. It's a pretty sizable defensive boost*. Some better shield runes on the thing, if you can manage, would probably help there, too. Maybe an acid wave rune, if you can get a hold of one. Fairly sure the golem's AI can handle that without blowing you up, these days.
Other than that, build wise, what you've got is workable enough. I don't personally go into fire alchemy very often**, and I probably would have put the reflection rune on the golem, but your bombs should be (would be, if you were using decent alchie gems for your level
) blowing everything to smithereens. If it's not too late to swap points from defensive posture into staff mastery, your channel staff hits would likely be hitting in the 2-300+ damage range very easily at this point, as well.
And yeah, stair dancing isn't something squishy wizard really wants to be doing. Might want to gem portal into a more open space and let the bombs do more talking than your face, heh.
*E: I generally don't put any points into the golem's con until after stat reqs for all their talents are met (or at least until reflective skin can be maxed out). General path is strength to 36 (or 38... whatever it is for the last physical talent), then magic to however deep in the magic tree I intend to go (at least reflective skin), then back into strength until the stat req for voratun plate is met. Stick the golem in plate armor, max out resilience, and get a couple good shield runes (and possibly the reflective shield rune, as well), and it'll tank well enough between passive toughness and active healing (refit, supercharge) well into the end-game.
**E:This is more personal preference and lingering dislike than anything. It's a pretty decent tree nowadays.
***E2: More explicitly, the problem with defensive posture is three-fold.
One: You shouldn't be getting hit, especially in melee. Bomb around corners, let the golem tank, etc. Sometimes it happens anyway, but it shouldn't be, and if it does, defense and armor probably isn't going to save you, heh. The ranged defense and armor
does help against archers, but your main ranged threat isn't archers, ha.
Two: Defense is frankly kinda' useless if you don't have
enough of it, and an alchie really doesn't have the means to get that critical amount. Defensive posture helps, yes, but see 1. 40-ish actually isn't too bad, but iirc you need somewhere around 50-60 at this point in the game to really get a lot out of it
Three: Armor, while still useful enough in small amounts/low hardiness, isn't really worth major investment in if you don't have means to up your armor
hardiness a significant amount. And alchies don't really have the means to do that unless they luck on to some pretty rare kit (or go heavy/massive, which... they could, technically. They don't really need much mana, so the fatigue issues aren't as bad for them. Most of the armor they really
want to be wearing is cloth, though.).
So it boils down to defensive posture just being kinda' hella' suboptimal on an alchie, at least when it comes to fairly normal builds. It's sexy enough on melee-centered staffers, especially the ones that would actually be going heavy armor (sunpas or reavers, perhaps), but an alchie doesn't really get much from the investment.