Uh it should be rather easy if you have rainbow dash, just atck up def drop it, use reinforce and make sure dashie has around 300~340 atck, and Pinkies pies spirit and you should be able to 1-shot it with a triple attack.
Twilight can easily keep it at bay by putting ursa to sleep.
then again i dunno if flutters can atk up buff for that i had AJ, Twi, Pie, and Dash.
If you really need help you should post your party too.
There are alot of variables to it to though, if you don't have enough attck on dashie you can always try to lower it around halfway then try to one shot the rest.
You can try to cancel ursas attacks with AJs and/or Dashies Tiger Stance and using provoke.
If ursas attacking to much dashie can speed boost your party members as well as slow down your enemies.
If your concerend for being wiped out constantly look around till you get a mana shield or a bounce mirrior, or a good lifeshield for twilight (i was lucky and has one with a celestia enhancement so it gave a good buff especially since i was on hardcore with about only 200 hps on the party) so the ursa doesn't stomp her, twi has def buffs and if you gave her the AIM one you can stop status probs too.
Theres a few other things you can do too you just gotta learn and use ur skills in combination and equipments, the crummier ones are there for a reason.
Twilight can easily keep it at bay by putting ursa to sleep.
then again i dunno if flutters can atk up buff for that i had AJ, Twi, Pie, and Dash.
If you really need help you should post your party too.
There are alot of variables to it to though, if you don't have enough attck on dashie you can always try to lower it around halfway then try to one shot the rest.
You can try to cancel ursas attacks with AJs and/or Dashies Tiger Stance and using provoke.
If ursas attacking to much dashie can speed boost your party members as well as slow down your enemies.
If your concerend for being wiped out constantly look around till you get a mana shield or a bounce mirrior, or a good lifeshield for twilight (i was lucky and has one with a celestia enhancement so it gave a good buff especially since i was on hardcore with about only 200 hps on the party) so the ursa doesn't stomp her, twi has def buffs and if you gave her the AIM one you can stop status probs too.
Theres a few other things you can do too you just gotta learn and use ur skills in combination and equipments, the crummier ones are there for a reason.