Basic how to win at AutoChess by Scott:
Health is just a resource. It doesn’t matter how much health you have unless you have 0.
Money is a resource, you have to get a lot of it so you can buy lots of expensive units, level up, and reroll. More money is more chance of winning.
You get money from win or lose streak, so pick one. If you roll high early game, spend more, level up, maintain that streak. If you got crap that’s going to lose, go open fort for awhile to guarantee losing (make sure you can still win neutral rounds).
Underlords specific strats: Interest is calculated when the fight begins. If there are units you want to buy to put in the field immediately, buy them when the shop rolls. If there are units you want to bench, wait. Buy them after the battle starts. Make sure when the battle starts your cash is at a multiple of 10. 5 is max interest though, so feel free to spend down to 50. You also can get 1 bonus gold for winning that will count for interest. So if you have 39 when the fight starts, and you win, you’ll get 4 interest. After the fight starts, fill your bench as much as possible. No reason not to. You can always just sell everything off before the start of the next fight.
In the early game, just get 2* units and some synergies so you have a team that isn’t complete crap.
In the late game, you need to have the best team. If you have the best team, you won’t lose, and won’t die, even if you only have 1hp left. In fact, having 1hp left is optimal because it means you used all your resources to maximum efficiency. The race car that crosses the finish line first and then falls apart.
To make an unbeatable team you need knowledge. You need to learn all the units, all their abilities, all the items, and which compositions are the strongest. You need to look at your final opponent and study their team to build a team that counters it. To gain this knowledge you need to read articles online, watch Twitch streamers who are pro, watch your opponents during games, see who wins, and see what units they are running.
For example, right now mages are OP and assassins are weak sauce. While you play the hand you are dealt in the early game, do not do that in the late game. You need to imagine the strongest team that beats your opponent(s) and force that build to happen. With the current patch you can probably force a mage comp every single game and you will basically guarantee top 3, probably 2 or 1 if you otherwise play properly.