In my experience and from what I’ve seen from others, Kalastor isn’t half-bad. Not nearly as good as Hagarrad but ok nonetheless.
to OP you could give this a try
http://www.grimdawn.com/forums/showthread.php?t=66783
RE: OP.
I used cannister it for the entire campaign on a Fire/Burn melee/ranged pyro. (it evolved ranged to melee).
[ol]
[li]At first with the stun for CC in the early parts, then later with the Mask of Infernal Truth in ultimate. And it was still doing a good clear job on weaker trash. [/li]*ultimately it was not a primary dot source for tough targets, but did add some burn to the stack.
[li]Then finally without the mask and CC node… and with high point investment in the base skill, purely for the burn. Basically an item-choice decision. Over +2000% burn at this point.[/li]
[/ol] It has decent burn-increment numbers and is a pretty reliable way to proc due to the large number of bombs on a target (such as Phoenix 100% crit proc with 15% crit chance per bomb).
With extra %duration, Canister burn can last until CD is over. The fire damage is very poor without special items listed in previous posts; the burn is ~ok, though.
Things I noticed about canister:
-good for big targets when centered (most all bombs explode for the non-dot damage. But considered same source for dot)
-excellent range due to both distance thrown and explosion area -for when you do hard stuff with a weak character, or for example, go in the smuggler’s pass back way to pull the troll boss and avoid the front hassle, etc.
-secondary bomblets can explode beyond a wall a small distance
-even with Ulzins, you won’t be spamming these too often.
-Improved casing is not really worth the points (maybe 1 pointer with lots of +) for fire/burn
Overall, though, nothing too spectacular.
Avyctes has gotten awfully, awfully close to the most exploitative and optimal use of Canister Bomb (IMHO).
I won’t give away the secret though. Maybe you guys can figure it out. It’s actually not hard if you continue Avyctes’ line of thinking.
It’s been known to most veterans for years about the true power of canister bomb. It’s really no secret, when stacking CDR.
Gildam Arcanum gear.
and a setup like this or whatever.
https://www.grimtools.com/calc/D2pKGDJN
No, that’s not it. And stacking GA gear results in diminishing returns because of multiplicative fraction stacking.
Here’s another hint: To paraphrase JFK, it’s not about what it can do for Canister Bomb, it’s about what Canister Bomb can do for it.
Would it be to drop the other barrelsmith for a cindercore?
No, the goal of that thing I’m talking about is not burn damage.
Dude, are you David Blaine or something, just tell us already. Is it one of the weapons that gives it 100% weapon damage or something?
I got it. It’s modding. 
EDIT: When you say optimized though, how good is it going to be?
My guess is aetherfire on canister.
Each shard counts as it’s own tick so it can proc one aetherfire patch per fragment.
We have a winner. 
The advantages of aetherfire over fissure are:
- Enemy doesn’t have to stay in one exact spot, but within a 2.5 m radius, which is considerably better
- Better AoE performance for same reason
- Imp gives 6 affinity for 5 point investment, much better than 3 affinity for 7 point investment for Magi
- Fast reflexes on re-casting CB when Ulzuin’s Chosen procs further takes advantage of zero cooldown
Flame Torrent can to bound to Grenado, Eldritch Fire to CT/WoA, Meteor to Flame Breath, and possibly Hand of Ultos to BWC. IMHO that is an optimal devotion setup.
In FG we can expect more conversion options. If that includes aether -> fire conversion, this setup will be stronger than ever.
Not sure it’s worthy of being called exploitative but it’s a nice trick for levelling a demo, I use it often.
Dunno, it feels like it because one can have dozens of aetherfires at the same time (maybe around 20 on average).
I believe the theoretical maximum is 576 aetherfires in MP, although this is of course extremely unlikely.
Aetherfires don’t stack with each other anyways, so it’s just a bit of AoE damage that isn’t very good on bosses.
That’s one of the reasons, for example, skelemancers go for fiend over imp.
Just wanted to ask about Aetherfire’s inner CD affecting its usefulness, but Snazzblaster is faster 
They do stack.
Do you actually know its numerical value?
I was sure that multiple Aetherfire patches don’t hit at the same time, and they all hit once per second at the same time not allowing to stack, for example, 5 ticks per second. Not sure about this
It’s something small but non zero, just like flame torrent. Under 0.1 second I would guess, exact value is unknown to me.
Meh, just tested with aetherfire. Seems pretty lack luster to me. Random patches going off. I feel flame torrent would be a better option. I really want to know what the max CD, and CD proc chance you could possibly get with gear using sorc class.