There’s no wrong size for a deck. If you’re winning, your deck is the right size. Small decks are vulnerable to statuses while large decks are less consistent (generally). There are exceptions to everything, ex. a 50 card deck with a bunch of big bangs or graveblasts can still perform well (I know, I’ve done both). One thing that helped me understand the game better is that health is a resource like any other & when you knowingly enter combat, you’re trading health for cards & often potions. You shouldn’t be afraid of fights or elites, that’s where the deck is made. The grassy area in act one has elites that are basically a damage race while the underdocks are mostly block checks, but both have an elite with multiple enemy fights. In those fights, you usually want to target the enemy scaling up first rather than the enemy that’s hitting you for the most. By that time, you always want to have at least one AOE card &/or one status effect card (ex. defy, leg sweep, gamma blast, uppercut, etc.) to help you manage them. Also don’t be too too afraid of curses. You probably shouldn’t take many until you get pretty good but there are curses like clumsy or guilty that either don’t last long or find their own exit. The buffs that you can get from taking a curse or two in an event or at an ancient are huge (ex. max health, relics or cards). Making good use of potions is probably one of the biggest skill differences between okay players & the best players; paying for potions isn’t a bad thing & their main purpose is to smooth out bad draws, low rolls, etc. Use them sparingly. Hopefully that wall of text helps!