"right now" would have to be 110, I guess. All around, for sure.
119 can only really be geared well through timewalking dungeons (this week is one, ending reset Tuesday, so you missed half of it already) and the BiS items are from the yearly anniversary event which is like 10 months away now. Im sure they're still OK without these items, but meh. Assuming you are talking about PvP… if not, then skip 119 totally.
111 is really prime for IE or old content, if you don't want heavy investment. Not much else that 110 isn't as good/better.