Great run, thanks for posting!
I will continue testing out the magic and even the melee skills of the warlock, seems those abilities are very strong too.
So far i can say this - this char was super fun but felt too easy to beat the game. Fire will get you easy thru norm and nightmare, in hell magic or melee would be better but as you can see fire got me almost to Baal.
Demon skills are too strong - Bind Demon got me thru hell with 1 point into it. Imagine what it can do with more points?! Imba. Needs nerf for sure.
Gonna focus on my grail sorc now - will try to farm runes and make the enigma for this guy. Also will try to gather materials and beat the new giant ancients!
I would say the fire skills are okay as they are. Druid/sorceress/assassin melts with fire just as easily, and they will get stuck on hell all the same unless they respec or go hybrid.
By the way, you could have cheesed Lister and his minions out of the throne room, then run back to finish Baal off without a respec.
I agree though that the demon skills are definitely too strong - stronger than they probably should be with only a single point on them, way stronger than e.g. a fire golem/grizzly/valkyrie/shadow.
I haven't tried magic / eldritch yet, based on what I've seen, eldritch seems overtuned with a 2H+offhand.