BLU already gets Triple Attack I natively. /THF was exceptional in the 75 days (especially with Cannonball being ranged), but isn't especially worth using over /WAR in the current game (which bestows Double Attack II when using Triple Attack on BLU).
The only utility value /thf will provide later on is if collab/accomp can be used as a sub, otherwise it's a poor sub compared to war, drg, or even drk