I do easy or hard mainly, but rarely normal. Easy I focus on destinies, and hard I focus on trap tiles. Normal is half and half of both, so there is no way to take advantage of that. Not sure if there is a difference between level 1 and level 2 in getting points.
I plan on trying level 2 easy tomorrow because I want to get ironheart spirit plans, but I'm not sure if I'm strong enough. Is 18M a reasonable strength to try it?
On a sidenote, I scored 800 and got an Ironheart Spirit Plan on the 3rd boss. Couldn't beat Minos Taurus though. The max I dealt was 56%.
For once i got a LB spirit from the 3rd boss in lvl 2 Normal. Wow that did take quite some time to get that spirit. Almost 50 times i must have hit that 700+ score but well the luck you know that laughs in your face.