Fortnite thumb buttons prove?

I've got a Razer Deathadder Elite but only one of the two thumb buttons occupied. The bottom on pyramid.

My assignments:

Wall = V

Stairs = C

Soil = B

Pyramid = thumb button below

Would you have suggestions to change something? Should I use the second thumb key?

So you have to decide for yourself what is pleasant I have eg the occupancy

Wall thumb button

Staircase thumb button

Floor c

Pyramid v

and fall old

Just try everything and see what you think is best