Tried the new limited gacha three times, two times following the "pull after getting a 4* in normal" theory and once after following "pull after getting 3 3* in a row" theory. Not a single 6* in any of the pulls, but I got 2 Peaches on the first pull and on the second one (picture it did happen below) I pulled Lue.. Leuc.. Waifu!!! and Strawberry Candle.

Those three seem to synergize pretty nicely, Waifu starts to hit harder with every solar blast, while Strawberry and Peach increase the amount of crystal drops *and* Strawberry adds 2-3 solar nodes (similar to Chocolat Cosmos with her healing nodes). Cactace increases crystal drops as well, so I think I'll add her to the squad as well. Not sure yet who to add for fifth member, for now I'll pick Edelweiss, since all girls so far are more or less single target, while Edelweiss can at least hit two with her special.

Oh yeah, pull image: