Agree with @NotZyreth .
Even if you don't use those techs much, getting the elemental boosts for all elements is useful because it gives a huge bonus to your compound techs. On my Fo/Te I'm running 6/10 Mastery 1 and 5/5 Mastery 2 on all 3 elements on the force free, and completely maxed for all 3 on the techer tree. You should have enough skill points to do this without sacrificing any of the other must have skills.
Also, the reason a lot of Fo/Te builds will focus on Grants is that a huge amount of enemies in this game are weak to light. But by balancing out your elements, you can use whichever tech is best suited for the situation without worrying about being specced into a different element.
This is my build, it's basically the same just with the remaining points filled in. I take the Talis skills because I prefer Talis: https://bit.ly/38ajYkg