Idk I just found a magic minigun with life steal affix. Prob because they are pretty much regarded as cannon and cannon can roll those affix.
Will it affect Canon's weapons? (I hope not).
I've tried the latest RE Mini I experienced this, when I want to add Socket in merchant I crash. I tried using original Canon and Minigun experienced the same thing. But when you try to add skill in other merchants like fire and others and then you add Socket then there is no crash.
I think if for "Life and Mana Steal" does not seem to be a problem, because Minigun has a time lag (colldown) in firing its weapon. It makes the weapon more stable. (that's just my opinion)

I tried to play on an elite level, and I used the voidseker / monster hunter class and also used minigun and canon for comparison.
Minigun:
When dealing with a normal level monster I can deal with it, but when it comes to monsters with an elite and championship level, you'll have difficulty fighting it (especially when you're surrounded by monsters.) And when you fight monsters that using shields, it will feel its shields so strong to be destroyed (requires a slight increase in attacks).

I think having Life and Mana Steal when faced with the elite level will help not be easy to die.
Can spell for collingdown be like another spell? (has a level in its use). Spell collingdown is currently only split into 3 separate spells and you can get spell I in the merchant while for spell II and III you can find it in a drop monser or treasure box, but not sold in merchants.

One more, arcane info for minigun range attack is not as it should be. Maybe still follow the info from canon weapon.