As a damage only boost Precise Shots just falls flat. Its decent in aoe but charges are always being wasted. Especially during Trueshot. I propose changing the functionality, instead of getting 2 charges, we get 1; and instead of boosting damage on arcane/chimera/multi, it makes the next cast or arcane/chimera/multi give us a 6 second buff that reduces the cast time of the next aimed shot by 50%.
This will help in in all scenarios and make arcane/chimera/multi desirable to use in all circumstances whether it be st or aoe; pvp, m+ or raid. And most importantly it keeps arcane/chimera/multi in the rotation during Trueshot.