I say spend on Allicia.
Leona's skill Aw just increases her attack speed with isnt much of a priority..
Also Parhellia wont be 'very' useful to u since you already have Chole and Miruno...so she shouldnt be top priority.

On another note...
Got Themis but seems like no luck with Iris...
I will save SC for the....'mega shark'..
so im not too worried about the current GR...will hapily take what RNG'eus gives me...for free