Februus is a very very solid defense type vs things like FRag or Phaleg.

Burst - Oversized Water DMG / Shortens CD on Abi 2

Abi 1 - Reduces enemies DMG and charge turn by 1 (Consumes -10% of max HP) [4T CD]
Abi 2 - Applies "Water Wall" (2000 Barrier + 300 Energy Drain) to all allies [5TD, 7TCD]
Abi 3 - Fire RST (30%) of all allies UP [1TD, 4TCD]

Assist - DEF up when Water Wall is active.