Understandable, but i would like to point out that you're incorrect about rpg maker not being able to do my suggestions by default, i know this because i've used it in a project before. You can look up "Damage formulas 101" to know just how much you can do with skills by default. Here's my example from before but in a more technical way;
"Heavy Slash - deals moderate physical damage to 1 enemy and buffs own defence by 25% for 1 turn" would be "a.addBuff(3,1); a.atk * 8 - b.def".
As for a different engine to work on the game i would advise against blender, it's not exactly beginner friendly.