I was thinking about taking Unbreakable last anyway cause I'll probably get Bringer of Rain and not use chest armor for a while,cause it's pretty hard to get a good 5L or 6L armor,but Bringer of Rain is affordable even at the start of a league,just a few chaos(I got one for like 12c in legacy on day 3,I think). I'm just theorycrafting now though,can't really play and test stuff cause I'm stuck at work.
edit: played a bit yesterday, finished a1-a3,then normal lab,then a bit of a4. Switching from 4link Sunder to 4link Blade Flurry(and getting different,stronger weapons),felt like a downgrade,tbh
I'll keep going though and see how it goes later on. Maybe my gem setup is bad,idk...it's Blade Flurry-melee damage-added fire damage-faster attacks(same setup used for sunder).