Thank man. Want to note that there is another better options on arrow quiver: rare Cyro Beam proc quiver and Kingsport's Signals. Both have good procs and good stats in it. I did use Bag of trick just because of the randomness.
As for merc, the best one would be act 1 Priestess merc cuz her Vindicate's healing is too great. Farm a xis and make rw Icebreaker on reflex bow for her then gear the rest with % dex stuff and she will be immortal. With this merc you can reach 4 mins fauzt and still have nice mf (400ish).