That is an awesome bank of resources! My preference is Indo over Erlidom. With cleansing abilities, three-turn evasive, and armor piercing plus defense shattering, I find Indo to be more versatile. Erlidom can be so easily negated with armor and shields, and I’ve never been terribly impressed with it. Glass cannon, yes (I had one do 12,900 damage the other day), but I still feel like it’s a niche player. This is perhaps because I run two tanks: L29 Stegod with an 8,626 HP (I’m more embarrassed than happy to have it boosted that high), and L28 Trago. Both of these provide a lot of defense against all but the most boosted Erlidoms.
Part of this is also bias because Erlik is so rare around me that I didn’t unlock it until like December or January. That’s Erlik, not even Erlidom. So all my grinding was to get Indo resources, and Erlidom was soooo far off that I put it out of my mind. By they time I could unlock Erlidom, I didn’t bother, because I didn’t want to waste coin on leveling-up my Erlik to unlock a L21 Unique that’d be 3-5 levels below the rest of the team, and outclassed. I’m now one lucky fusion from L30 with my Indo.
When Erli works, it really works, but when it doesn’t, it really doesn’t. The same can be said for Indo, but I feel like it’s effective more often than Erli, and fails less often.