Zer0 isn't very good early on. Once you're able to get Kunai he can start dealing some damage. --- Tempted by the fruit of another, tempted but the truth is discovered, what's been going on, now that you have gone, there's no other.
I started mine with Cunning then worked down Bloodshed. He gets pretty sick and fun to use at later levels. Death Blossom / Execute paired with Many Must Fall is very fun. --- You're born with nothing, better make it enough.
Middle tree does give a lot more survivability (fighting at a distance) until you can get some 100% melee damage weps and shields.
Law and Order are a real good start.
And you can Melee in the middle tree just as good as the Bloodshed.
But you're honestly going to do more damage with weps until your get a: Melee override + Damage Relic Melee Mod (or cooldown reduction so you can do last second invisible super crits more ofter) 100% or 200% melee wep (gun damage doesn't matter, just the % melee damage) Roid damage shield (but you need a way to stay alive without a shield so you're limited to Law+Order or putting points into heals until you feel like a ninja)
Bosses are touch in the bloodshed tree while you're solo. You just run away, stealth and come back. At max level you just 1 shot them so... yeah... there's that. --- Apparently The Warden and Hawke went on to join Revan and The Exile in their fight against The True Sith. I expect Sheppard to join them soon- Cheator13
looking up morning after kills forever alone zero build thatch what i use end game its alot of fun. specially if you get all the items he suggests so you can experiment --- Did I mention I don't have a medical license