Best Equipment?

ARGO: All depends on your vehicle, and your fighting style.....I myself choose a defensive posture so naturally I choose a tool kit, camo, and rammer for my heavies. Tool kit is good in any tank because I find it help greatly when your tracked getting it back up. If I run a TD, I like to have a rammer, camo, and coated optics or binoculars to insure better hits. This in combination with a well experienced crew in repairs or camo to me make a big difference but Again, I choose a defensive stance and my combo may not work well for a more agressive player. Here is a little break down:
Heavy / Medium tanks = Camo, Tool box, Rammer
TD = Camo, Coated Optics, Rammer
Arty = Camo, Gunlaying drive, Rammer
Light tanks = Prayer, A well written Will, Supreme luck.