Ursula to 5-star

This isn't really a question, more a suggestion. Arena assault requires seven teams, and I am sure not everyone has 7 counters to the current meta cancer that are Brave Lyn and Reinhardt. Surprisingly enough, Ursula is a F2Punit who can deal with both of them on the defensive.
Brave lyn will deal 32 damage in her first hit, then Ursula will counter for 30 damage thanks to her blarwolf being effective. If you change her A-passive to attack+3 however (you cant use buffs because of mulagir), you will deal 35 damage, enough to 1-shot her before she gets her second attack. Reinhardt with death blow will deal 17 twice, leaving Ursula at 1 Hp, but she will also 1-shot him. If Reinhardt is +attack, the attack ploy seal can be equipped to ensure she survives.
If they have Cavalry buffs, you will be forced to use Valter or another unit with panic ploy (they both have a bad hp stat and will get debuffed even with a +hp nature)
Obviously, do not use her in your first team, because her horrible bst will impact your score negatively. I'm not posting this to tell everyone that Ursula is the best unit in the game, mostly to help F2P players struggling in arena assault, as there are few units who can counter both brave lyn and reinhardt.