Never used the lv110 boost from BFA

So who should I use it on? This is my main and I have lots of characters lv 100, 90s, and lowbies. Outside of BM hunter I’ve had most fun playing Enh shaman, afliction lock and Fury Warr. But I can be swayed into trying out a top dps class. Still I want to use this before the lv squish and also before the shadowland preorder since I am thinking of getting the one with the lv 120 boost.