Repulsion and Repulsion Pulse.

Gravity Pulse is a good enchantment for tanks, but I had another idea; Perhaps you could add Repulsion Pulse, with a turquoise theme instead of purple, and Repulsion which is for weapons. Repulsion pushes enemies away from the the impact point, while Repulsion Pulse pushes enemies away at the same rate as Gravity Pulse. If both Pulse enchantments are added to the same item, they alternate: Gravity Pulse, 5 seconds, Repulsion Pulse, 5 seconds… You get the idea. With Gravity and Repulsion, every other hit is whichever one. The Enchantments are powerful tier.