oh omg I already beat the game 3 times now and I'm having trouble thinking of it-- if I knew you were going to ask that question I would have taken a screenshot. I think the first time I beat the game I used a lot of things that enhanced my ability to shield myself and attack, like shields up, shield bash, and the one that gives your shield thorns, along with forge?? Also venomous bite, volley, healing rain, health potion. Extra attack cards, meditate, full moon, corrupted aether. In later games I got a lot better at using combos and prioritized flexibility.
I tend to play really defensively in most games so I struggle sometimes to get enough damaging cards in my hands. At one point I had to give up because I got call of the void early and I couldn't get enough damage cards going, and eventually my hand filled up with shield spells and my enemy couldn't damage me or do anything. So I had to concede. It was really silly.
edit: oh omg and necrotic blast-- it's so useful!! It's kind of hard to time since you need like 3 AP at the start of your turn to really use it to its full potential but it's a lot of fun, especially chained with fire blast. I really like how well-tuned the difficulty is and it feels kind of fair? That's actually the reason I tend to prefer rougelite games or hardcore modes-- a lot of other games feel really unfair in favor of the player, and it feels like the game is just letting me win. I think my favorite card is probably seance. Edit 2: turns out it's actually radiant burst!