Yeah, pity that event girls like this one have only a single way of evolving by godifing only. They could give us another variant that would like other 5* girls let us evolve her via normal mats. Heck maybe for example let us evolve the godified 6* to another version of 6*.
Well what we can do, we can always use option 3 - get a 5* Luk 1, and 6* Luk 91 alongside the 6* Luk 99. Have two decent Luk 6* for sake of GvG/Campaign/event maps, and one of 6* and the 5* for sake of total wars.
I think we are asked to make 5 combos. Not exactly a one combo of 5 or more. Guild I joined is basically dead, there is like 2 guys, one shows up once per 5 fights, hits once and then leaves. Another one that hits like a truck (high level player) shows like 3 out of 5 fights, but he knows what to do aka he nicely comboes with me.
I am lucky thou even more, as I did play this game a bit before the colab and dropped it cause I found it really bad. But that "head start" gave me a girl that has a +2 to combo move. So when that high level dude did show up, we often reached 10+ combos, 17 I think being a record. Couldn't do more, cause at that point the guy basically nuked to zero enemies, and when they are down you cant continue with act attacks thus cant prolong the combo further.
EDIT:
As a side note. I wish that those colab events have had some type of trackers, so that you know when you done everything you needed to. Thou looking on how X-Overd and FKG colab had people on both sides being angry that they got wrong rewards or didn't get some of it that they should, something tells me that the tracking mechanics would works even worse than the summing up of the colabs after they end hahaha.