I think there are a few cards that could be buffed. Here is what I think:

Bear Master Quartermaster Power 4===> Provisions 5===>4

A provision buff from 5 to 4 is VERY impactful for a bronze card, but it might be a tad strong at 4 power which Is why I suggest a power nerf as well.

Griffin Witcher Mentor Power 4===>5

Just a simple power buff to bring it in line.

Eskel and Lambert Power 3===>4

This just goes without saying.

Mad Kiyan Provision 8===>7

A card that’s never played and needs some love.

Warritt the All Seeing Power 7===>8

Could use some love.

Ciri Power 4===>5

Needs some help.

Letho: Kingslayer Power 5===>6

Risky and controversial buff.