my own fighter class; please juge harshley

[Dalek Zek]

For example, if you need to roll and 18 or higher to hit:
You have 15% on 1d20
You have 7% on 2d10

and the 2d10 and 5d4 of the maceman and archer? are these better or worse?

(I'm trying to do the math, but its not going well. Is there a trick I could use other then going past all numbers and havin to sart all over again after making a mistake?)