I'm not realy into cloud chasing, but a nemesis with this dripper
https://www.fasttech.com/product/1669100 Gives me tons of vapour. This is the best dripper i've tried so far, and there's no need to drill the airholes on this one.
I'm also using the anodized aluminium tubes for nemesis which apparently helps with conductivity, but i don't know how much of a diffrence that is.
I'm mostly using nemesis with kayfun around 1 ohm, which gives to me personally a nice vape. But for cloudchasing kayfun isn't that great.

I'd go with a nice dripper like the one i posted.
I assume that you know all you need to know about battery safety and all that?
Get an ohm reader and a multimeter.
A good charger.
And you already got good batteries.