Sword Eirika should I 5*

I am in the grips of indecision. I have had a 4*+10 Eirika for some time. I had pulled a 5* of her back when I had 4*+6 or so and just downmerged her for her unique weapon. These days I somehow have 2 5*, 7 4*, and the 4*+10. And that is after I have use a couple of her for inheritance. The girl just won't stop stalking me. Seriously I have never tried to pull for her as a focus. 3 5* pity breaks and something like 26+ 4* versions. She is one of my most pulled reds. Pretty sure I have had more of her than of Stahl or Hinata.

ANYWAYS. She was a staple on my Arena Defense team even before her unique refine and these days she is just a major player. And since I have enough feathers to shoot her straight up to 5*+5 and am only a few k from 5*+6 I am seriously considering upping her.

If I do up her I could changer her from +ATK/-HP to +ATK/-DEF. No +spd copies so even if that interested me it wouldn't be an option. I do tend to use her more offensively than as a buffbot.

So mostly this is a, would you do it question? I am just looking for opinions to tip me over one way or another from my precarious ledge of indecision. Also do you think she'll stop stalking me if I finally 5* her? Or will Mage Eirika just stalk me then? Already had her pity break me once(actually at the same time as her sword version). So maybe she isn't going to wait.