Originally Posted by saike

buying the gatchas is better than buying the n cards? because you have a shot at getting rares and super rare

Depends on the price. There were several bugs where a single N wildcard cost only 100 pero. Compare that with the bugged 1k pero N gacha ticket.
I think it isn't tough thinking about which to buy.

FYI: even if you've maxed out normals, you can trade those 100 pero N wc for R wc at the trading post. The eventual calculations would give something like 2k pero for 1 R wildcard. I believe that is more reliable than 1k pero gacha tickets, so yeah. Rare situation, but it has happened twice.

Alternatively, simply save pero for when they attach freebies to the pero items (either N gacha ticket or N wc), such as card reveal (happened once before) and the pink keys that you need for gambit.