Rho

Rho is a tier 5 tank that upgrades from Proton and Subverter at level 60. It is a Subverter with half turrets half shields on the ring. It looks like a Revolutionist with 2 circular shields in the gaps of the turrets. Rho works like a Revolutionist, just with shields to block things. Use the shields to block certain tanks, but avoid the Builder branch, as the blocks will just go around the shields.