For the Rough Rider vs Neogenator vs Evolution I found an old script I had for max health and shield calculation that I used a while ago at the old forums, these are the numbers I’ve got from a lvl72 Psycho with 5/5 in Feed the Meat, +62% health relic, no BAR and only 5/5 in Numbed Nerves for damage reduction (outside of Rough Rider’s mod).
ps.: Don’t remember if I actually tested these values so uhh, yeah…
No shield
max health: 1124796.0401
health + shield: 1124796.0401
maximum hitpoints: 1687194.0601
depleted shield: 1687194.0601
Rough Rider
max health: 3191028.6001
health + shield: 3191028.6001
maximum hitpoints: 5424748.6201
depleted shield: 5424748.6201
Evolution
max health: 3334558.9601
health + shield: 4129192.9601
maximum hitpoints: 6193789.4401
depleted shield: 5001838.4401
Neogenator
max health: 3334558.9601
health + shield: 3854549.9601
maximum hitpoints: 5781824.9401
depleted shield: 5001838.4401
-?
max health = (base_hp + shield_hp) * (1 + bonuses_hp), where bonuses_hp is the sum of the health relic’s mod, Feed the Meat and BAR (wich was zero for this)
health + shield = max health + shield capacity
maximum hitpoints = (health + shield) * (1 + total damage resistance), as in, the necessary ammount of damage needed to bring both health and shield down to zero taking into account damage resistance
depleted shields = (max health) * (1 + total damage resistance), same as above except for zero shield capacity
tl;dr: Depending on how often your shields are up an Evolution or Neogenator gives more survivability than a Rough Rider, with shields down however Rough Rider still seems better.