Is 3 GB RAM enough for heavy multitasking and how's the battery life?

Buying a Nexus 6P soon, how's the battery life (screen on time) for this phone with 3G / WiFi always ON?

And how's multi tasking on 3 GB RAM? Most phones come with 4 GB RAM now a days and the only drawback which might now be so much as a draw back is the 3 GB RAM according to me.

Please let me know.

Cimo [Shockproof] Case Heavy Duty Shock Absorbing Dual Layer Protection Cover for Mic

Just received the Cimo case and it fits great and looks like a good deal of protection. It also works with my Note 3 and LG V10 Seidio Holster, this seems to my like a good option since none of the major case makers have jumped aboard the 950 XL train.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1