I am ordering one of these for mine:
https://www.fogstar.co.uk/products/samsung-40t?variant=12923713355835
The battery life on the Squeeze isn't great in TC mode but okay on VW mode, but I would have a 2nd as it won't last you all day unless you are a low wattage or light user.
I will be revising my review of the Pico Squeeze 2 to recommending the kit now, I have shoved a different coil (SS316) in the coral V2 and positioned it slightly higher and it's pretty good plus you get a battery included.
The Niagara how ever is a Dual Battery and last very well with the Fogstar 18650's, I went for some Samsung 25R's.
I own both mods and if I had to replace one of them it would be the Niagara with it's battery life and performance, I am quite happy with the wattage only using my Squonk RDTA.
Personal preference though it might not be right for you.