I’ve been running Ash Prime in Steel Path just fine, it’s a blast. The only thing I keep running into (literally) are toxic clouds that kill me pretty quickly. Other elements don’t affect Ash that way, just the toxin. Should I mod him for resistance to it or just use Rolling Guard/Adaptation? Rolling Guard has been working okay but I still have to stay away from toxin clouds as much as possible.
Toxin bypasses shields and your shield gate. It’s an issue for lots of frames in SP.
If the problem is the damage over time from the status effect, Rolling Guard and/or Arcane Resistance helps with that. But those don’t protect against direct damage, e.g. if a Toxic Ancient hits you. The mods Antitoxin and Toxin Resistance (aura) can help with that, but I’ve never used them, I don’t know how effective they are. And of course staying invisible and not getting hot.
Most frames are weak to toxin tbh, with ash the best strat is to just stay invis and not get hit, toxin clouds and Moa tar are easy to dodge if you pay attention to your surroundings and invis is probably the best counter to toxin eximuses
Toxin will kill you through shield and shield gating (I think Hildryn with overshields is the exception), so if you are relying on shield gating + invis to survive then you will just need to avoid toxin damage.