Wand bonks still do competitive damage numbers on Te/Fi as far as I understood. The difference is now you can cast. Try to mix up your stuff with two spell rotations like Grants --> Illgrants if you aren't in a position to get in there and get more PP. Otherwise read whether the loss of DPS from using Grants is worth the reliability it gives you over using Illgrants.
It's not going to do absurd amounts of damage any way you run it. Te/Fi exchanges the Hu survivability with the ability to cast techs without a significant loss of DPS. Hell, someone may come along and correct me and tell me tech DPS is superior to wand bonks, but I know mob collecting and whacking is still the go-to for mobbing. Also your sub-pallete gets even more crowded as you can/should add the compound techniques. At least Zandion. No reason not to cast Zandion.