Thank in advance!
There are no s-tier uni's that you still need? I say if you have them all then you are pretty ahead and an mrut wont even do you much. I fortunately needed 17 uni's but then i realized i have no one to use the ticket on lol
If you really need that mrut for any specific character then go ahead. But sharon's uni is definitely going to make her meta or atleast one among the metas.
I'd say go for it as you've spent ~8000 already.It may take a long time for you to get another 10k crystals.A mrut outweighs a single uni in my opinion.
All I want to know is, how did you enlarged the text?????