Quote Originally Posted by Unregistered View Post
No, they give up to 50%. They start below 50% (to be honest I don't know what value they start at) and go up in value for each eidolon of their element that you have equipped. So using Horus as an example again, you would only get the 50% bonus if all of your eidolons are Fire.
Kinda useless info since everyone seems to know they suck, but just to satisfy ppl's curiosity, according to the JP wiki, Illuyanka and Horus and the like, they start at 20% + 2-6% per sub eidolon of matching element depending on LB.