Celtic Heroes

hello,

I've used to play on a normal iPad 2 but since all the new updates i can't even log in anymore so I haven't played this game in like 1/1,5 years.
my question is can i play CH smoothly on the Apple iPad 2 Air, or do i need to buy an iPad Pro or an iPad 4 Mini? and if I can play it smoothly, for how long?

any other suggestion? (I'm an Apple fan)
so is the Apple iPad 2 air any good or do i really need to use the Apple iPad Pro.
keep in mind in just an 17 year old, who workes at Burger King so i dont have so much money, and i am saving up for an iPhone 7 aswell

Much Love, Luuk

I use the Air 1 and I can run the game at max graphics fine

Got all my information, i think the ipad pro 9,7 is the one im going for