Addy costume core (previously said by ryolnir to be prom)
Really hard to know how significant bloodlust is because it isn't taking away his health at the moment.
I only played melee build.
You cannot really play hybrid, his ranged tree has ranged versions of all his melee powers and they share cooldowns with the melee versions. Using a mixture can be done but you would only do so if you want that playstyle and don't care about a damage loss.
His uniques are good, hit 50 in everything. Has 24-25k health. Nice passives. Fairly good regen (gives group constitution), some life on hit. I think he needs a 25% core and doop runeword depending on specialization choice. His signature is Mr. Fantastic's with half the damage, half the amount of bounces but half the cooldown and you don't have to use all 3 jumps back to back, just within 15 seconds. His powers fit on a bar pretty well.
Potential negatives:
His bleed situation is weird but it seems like an easy thing to fix.
I could see people finding him a bit clunky but the powers that have animation lock are very highly damaging.
Lacking in big AOE.
Rotation:
Standard rotation looking like: UV Grenade (scaling stun +10% vuln) > Glaive Orbit (applies his one non-stacking bleed) > Toxin-Loaded Gauntlet (a Dempsey Roll-like combo with a huge burst at the end +35% vuln with that trees powers) > Stake Through The Heart (huge 1 target nuke CD, 2x damage to bleeding) > Hack n' Slash (spender) until repeat.
Pretty standard rotation, pretty standard mechanics with a new underlying mechanic mixing things up (his Serum mentioned above).
Serum:
You gain Bloodlust from applying his one non-stacking bleed, when full you gain 10% attack/move speed and 10% damage but lose some health constantly. Your 3 options for specializing the mechanic are these:
1. +defense and +20% health when not Bloodlusted. Bloodlust gains 50% slower. - You never have to be Bloodlusted with this.
2. Instantly reset all non-signature powers, restore 25% spirit, you maintain the 10% damage and attack/movespeed at all times but with no health loss. - Seems like you will be actual Bloodlusted (losing health) for only 4s per 12s this way. The other 8s you have the benefits of Bloodlust with no negatives.
3. +10% damage, +10% crit chance, +10% spirit cost reduction, double the health loss from normal Bloodlust - Always Bloodlusted, 70-75% crit chance, constantly losing HP (can't know how much because of the bug)
Worth mentioning that you heal for a nice chunk when you use Serum and go back to 0 Bloodlust, it's about 14k health with full Bloodlust. The 1st spec doesn't reach Bloodlust so this heal is nice but not as big, the 2nd spec should get the full 14k health every 12 seconds and the final build would only get the heal in dire situations because you are sacrificing damage for it.
Also he is a dodge hero and we don't have the defense rework yet. He is deflect/defense which means pretty squish for now.
He may gain bloodlust much faster than I'm seeing, during testing vulnerability stuff with his bleeds I noticed that his AOE bleeds are only applying the bleed to one target.