Im normally playing monk, and when I hit 70 I normally go for haedrigs, but now that im gonna play wizard for S10, what is the prefered path to take getting the hydra gear? Is it worth going for haedrigs and use the gear from that to farm for hydra or what are people going to do?
You should get any gear that lets your farm t6 / t10 / t13 efficiently as fast as possible. Getting the actual end game gear for pushing comes with time, but until then you should get the gear to farm more and more efficiently.
DMO might not be the best set, but it's decent and will help you get to t10 quickly.