DILLON_STEFANY'S PROFILE

Hello all,
i need help about damage formula for simple attacking action.
if you ask me why i want to change the default damage formula in RPG maker VX Ace,
that's because the default parameters in RPG maker VX Ace is actually high. In level
1,HP is set at 500+. In my game, i want to set HP at 40. That's why i need to adjust actor's parameters and enemy's parameters and damage formula, so when the weakest enemy attack my player in level 1, it causes around 6-8 damage. It works perfectly at first,
the problem occurred when my player's level is gone up, in around level 4, that weakest enemy couldn't damage my player at all. If i didn't change the damage formula and just left it as the default, it actually become worse because that weakest enemy can't damage my player when his level gone to 2!!
I tried to change it so many times, but i can't erase that problem. Can someone help me? Maybe u can help me find the most suitable damage formula for a little HP.
Thank you before ;)