What is da best armor

What is the best armor for killing if fully upgraded

Majority of people would say Infiltrator but I think the Tank would be pretty good at killing. Lets say theres this one aisle, and the infiltrator and tank are charging towards each other with an unupgraded auto-rifle. Tank would win. Infiltrator is just more fun-er than tank.

Sniper cuz of targeting. And infil would win. Tankers r slow and infil could jump and turn and BAM headshotz

Tanks can turn to? I forgot about sniper, thats a good armour as well. If the tank was running down towards a sniper he would get pwned since the sniper is too strong.