[@thewizardguy]: Okay, uh... Problems. Where to start, where to start:
First: Power. We have Evangeline in the RP, but by means of two other characters that are essentially acting as mana sinks she's nerfed from pulling off a lot of her bigger magical shenanigans. Your character... Does not have anything like that. Unrestrained, unfettered, forced a coalition of the strongest mages from her own home to convince (not force!) her to leave, literally infinite mana supply, strong both at close and far range... Yeah. Power level too high relative to everyone else.
Next: Personality COMBINED with that power. A psychopath with that much power basically means that a lot of people are going to be out to take her out for good... And it'd honestly likely throw the RP way off course if that didn't get handled in turn.
Third: The reason why the characters arrived is supposed to be vague, and hopping dimensions leads to a direction where it feels like the character's going "I was gonna come here all along!" That's not good for what stuff I have planned, and it kinda limits a buncha stuff by implication.

So... Yeah. Denied. Sorry.

[@VitaVitaAR]: I... See no issue with just swinging big hammers around with inexplicable force, I guess. Accepted.

[@KoL]: Yeah. The next rate up Saber that'll come to NA is likely Okita; most of the 4* ones for a while (ESPECIALLY SIEGFRIED) are subpar as of right now; Nero's a tad weak at her biggest schtick until her third interlude, D'eon needs her third skill and NP interlude, Saber Lily's statline is abysmal (but you don't have her right now so whatever), and Saber Alter's locked behind the story gacha (which you ideally never roll unless there's a special rate up). So... Yeah. You're just gonna have to wait and pray.
Or Berserker meme your way through everything. I'm doing that right now on NA until I get Tamamo or Jeanne to round out my arts comp (mainly the former). :D