would it be better for me to go to taverly dungeon and cannon them, instead of using chaos tunnels, because of my lower summoning level and lack of good combat familiar?

If you have access to the black demon resource dungeon that might be an option to consider. Otherwise I would just cannon them in Taverly Dungeon.

I do have access to resource dungeon, would the emptiness + numerous spawns be faster than cannon extra dps?

Get a bot free world, go cannon.

 

If not go to CTS

 

 

 

yes go cts