He's not the best Tech champion or one of the best champions.
There are plenty of better TECH champs than Ultron like SL, SMSE, Ghost, Vision, IMIW, Doc Oc, Sentinel etc.
But Ultron is definitely not a waste of 5* crystal.
Bleed Immune, Poison Immune, Good Regen, Evade, Armor up, Bleed, Stun, Energy Absorption (when duped). Good (if not great) for defence. He's like a swiss army knife.
His attack is not that good but overall he's very useful.
Mastery Suggestion for Ultron: Recovery/Deep wounds.
I like him. He was my second 5* champ and can hit hard. However since so many people use him on AW defense now his moveset is quite memorable. Still makes a good champ
Comments
There are plenty of better TECH champs than Ultron like SL, SMSE, Ghost, Vision, IMIW, Doc Oc, Sentinel etc.
But Ultron is definitely not a waste of 5* crystal.
Bleed Immune, Poison Immune, Good Regen, Evade, Armor up, Bleed, Stun, Energy Absorption (when duped). Good (if not great) for defence. He's like a swiss army knife.
His attack is not that good but overall he's very useful.
Mastery Suggestion for Ultron: Recovery/Deep wounds.
You should take him to R3 (at least).