They are a pain to shuffle and drawing them the stack often slide over.
I was wondering if sleeving the cards can solves the shuffling problem?
Yet I worry that sleeving will only make matters worse when the entire deck is stacked.
I've sleeved them and I believe now it's easier to shuffle them.
BUT there's a real problem with the deck stability, sliding over (and not able to keep them on the original insert since the deck is now much thicker).
Nonetheless, I think it's worth sleeving Ally cards. Not because of the damage on edges when shuffling (they are only shuffled 2 or 3 times tops on a game), but they may stay for a lot of time on our hands, and now they're protected.
Just place the Ally deck somewhere "safe" on the table, or divide it in two stacks.
By the way, I bought 43x65 MayDay Mini Quimera ref. MDG 7045 for them (which should appropriate according to the card size), but it turns out that 41x63 MayDay Mini USA ref. MDG 7039 fit better, like a glove.
43x65 are ok though (cards are just slightly loose inside).