Change up your strategy. I acted as sole stunner during phase 1 as DRG without dropping my dps all that much, and co-stunned with our tank during phase 2 with no problems. So many jobs have a stun move that you probably don't even need to be the one doing it as a paladin. Just because people tell you a strategy doesn't mean you HAVE to follow it, find something that works better for you.

In the case of eruptions, every single one can be avoided if you aren't bad at dodging, that's just a "get gud" problem.