honestly, once you pull SSR eidolons to where they give more than an event one, they aren't a scam... unless it's strictly character attack with either burst damage up or ability damage up. those character attack ones are situational...

there's a rare instance where I might stick Huanglong in a main slot (if i somehow need the HP), but MLB echidna is the 2nd highest fire elemental boost and the highest dark elemental boost in the game right now... how is that a scam?

it's luck oriented sure, but when you get the elemental atk eidolons going, two or three of your teams is covered until you (hopefully) get a 100% eidolon. those gacha ones go up to 50% (tri element) or 60% (dual element). most you get from ANY event eidolon is 50% (and that requires a full eidolon deck matching it's element) with the next closest being 45%.

then add on the fact that to overtake something like a lv100 echidna, you need to have both belial AND the 100% dark eidolon we don't have yet... otherwise your echidna still has use somewhere.

i'm not saying by any means to rush out and go gacha crazy. but what I am saying is that if you get one of those elemental gacha eidolons, it's not bad unless you have one that's stronger in all the areas they cover...

but i can agree that the character attack ones could be a scam. those need specific setups to really work