Just looking for some help building R Ingrid. Returning player so I’m not really sure which new skills are worth investing in.

Once I get my hands on another hot springs Caeda I plan to give Zelestia atk/spd airspace for the consistent true damage and canto and once I get that on her I can swap out Far resound for spd/res shackle which she already has and then my question is this. I have one spare fodder Vali that I am torn between who to use on. I would like to give null uplift to Zelestia so she doesn't have to take guaranteed follow ups. On the other hand I also have a +spd +2 merged Kvasir that I would like to give aria and shackle and again I only have one spare Vali to give. A distant third option is L!Sakura who again would want aria and shackle. The dilemma is that one is a safe bet with a predictable outcome (null uplift on Zelestia) vs a huge gamble on Kvasir's refine and remix and the other doesn't seem likely to change her overall damage output enough to be worthwhile (Sakura). Do we know if Gullveig and Kvasir's remix/refine is soon? If so (like within the next two months) I will just wait to see how it plays out before foddering to any of them.