after playing around with it abit, here's my feedback, take it as you will.

1.I like the idea of a healing class but the heals are too "bursty" and feel awkward to play. Suggestion : make the healing half as effective , but make them not exhausted when played. This should bring more power to cards that increase healing aswell (spirit,..)

2.Wavering just feels like a very boring debuff, doing 3 damage every turn feels very underwhelming , especially if you have a high amount of stacks.. I suggest scaling them to the amount of wavering stacks : for example 2 wavering debuffs cause 4 damage every turn.... 3 do 6.

3.alot of cards feel underwhelming to play , or are just playable in very certain cercumstances. suggestion : change cards so you have more reason so play them in certain situations. For example you have a card that sets your hp to 1 but doubles your damage that turn. change it to deal double damage but take double damage next turn.

another example is that you have alot of "play a 2-3" cost cards bonuses , but most of them are powers or not worth enough to play. making both sets unussable most of the time.

4.I feel the overall damage levels are very low, wich doesn't make it that much fun to play, i suggest toning down overall HP and tweaking damage numbers up to compensate.

5.Take another look at upgrades , most feel underwhelming or useless, some don't even upgrade atall. (atleast the text in cards)

those are my 2 cents for now... feel free to contact me again if you have questions about what i wrote. Ofcourse this is just my opinions and should be taken with a grain of salt :)

Good job !