What do you mean "you can't die" ? :D What king of build did you have and how far did you go?
Most people die on level 6-10
I also don't understand "..I found myself spamming for the desired choice.." This might work on level 1 or 2 but later there are a lot more enemies and specifically enemy archers. Of course on something like level 1 with enemies that don't really go out of their way to hurt you, you can wait for an "arrow" dice and just shoot the remaining enemies, but on further levels you'll get shot by archers and enemies will hunt your units down. This strategy will not work
This game is about making moment-to-moment decisions there are just as many useful dice as there are useless. The further you go, the more important every choice gets, because the playing field becomes larger and the enemy army grows and becomes stronger!
Seems like you didn't get very far.