(SLX) Heart66 Pack (İn Development)

[heart66]

I am currently developing an SLX pack. Actually, I almost finished
My problem is not creating the levels but two (2) points:
1- rating the levels (easy - medium - Hard)
2- Skills assigned (should I give the skills in which I solved the level with or more)
Attached is an example.
For me, it is an easy level
The normal way of solving it is by 20 balloons and 20 speary and a stacker of course.
My solution Was different and I used less skills
I really need help in this. Your feed back is mostly appreciated.