So that's that for the summon farming, for now. If you still have mats to trade in (like for 1/2 AP pots), third tab in the crafting section of the shop. Got Cocytus summon, lb1 Diabolos (from a last-minute flip), and three earth guns. Spent a lot of time instead doing half AP Hard raids, which has left me with quite a boost to the wind and earth pools of mine and with all of the crystals from hosting magnas claimed.
Also, event rerun
Event looks to be like MANLY FISHING (fight raids, gain points and gacha tickets) but Water-based so bring out the Earth team. Probably don't need anything too out of the ordinary (maybe a veil/clear if you take his standard ougi since it has a nasty DoT), but his OD ougi can be very devastating if it focuses one party member. The event unit's a fairly standard earth tank: he's got a cover and his third skill gives him an attack and defense buff to use with the cover. The SSR Spear and SR Axe are both attack passives, and the summon is really useful when mlb for its active: small Atk/Def down on the enemy team, and small Atk/Def up for your team.
Blue crystal fight doesn't look to be too hard once you know the triggers, just have to defend against them and then chain ougi past the third if Kat's damage cut isn't ready yet.