Your card-stuffed wallet is a battleground. AIB and Bank of Ireland are fighting for space alongside credit cards, Revolut, Monzo, and N26. Even An Post is upping its game.  The Irish banks are so worried about new fintech competitors that they’ve clubbed together to build a new payments network. The payments network won’t be as good as the off-the-peg solution available in the rest of Europe. But it should help keep the fintechs at bay for a while. All these cards have their strengths. The debit card is the one I entrust my salary to. Credit cards are for credit…