Am I missing something? Are eldritch cannons and tentacle of the deep from some UA article? Because they don't appear to be a thing on DndBeyond and I've never heard of them. 
As far as familiars and summoned things, they are creatures not the delivery method of a spell. Familiars in particular aren't exactly meant to be combat spells in the first place, even if they can help.

As far as familiars and summoned things, they are creatures not the delivery method of a spell. Familiars in particular aren't exactly meant to be combat spells in the first place, even if they can help.