Here's my 10 atm.
1. Anopheles Card. Chance of +3 AGI Food from Insects. Win
2. Armeyer Dinze. Same as Anopheles but it's +3 VIT Food from Fish. And if you farm Byalan like I do...love.
3. Mink Coat [1]. It has no stat bonuses but I've always liked them. Respectable Base Def.
4. Ghoul Card. Got it the other day in Nameless and someone said Hatter....+20% Poison Resist in Headgear is nice IMO. Pair it with Argiope Card for even more poison resistance.
5. Sky Petite Card. More damage resist from Dragons and goes in a shield. Essential for a good Abyss Lake set.
6. Santa Poring Cards. Pretty easy & cheap to get. Make an Anti-Shadow weapon for Odins & Nameless.
7. Dokebi Hats. The autocasting of Hammerfall is very useful at times.
8. Requiem Hat. Pro.
9. Argiope Card. As listed above, with Ghoul it became much more useful with addition of New World.
10. Stone Shooter Card. A good, but not great weapon Card for melees.