slope

I'm making a slope with a block railing to wrap around a cylinder, but I can't seem to find the right height with the arch tool, as when I put the height in, it goes higher than how high I want it to go and it looks like stair steps. Here's the reference (what I want the slope to look like):

koth_slope_a3 I Didnt upload a1 cause I forgot to do it sorry. also guys im going to try and get this on a gameday so I need some help with feedbacl :3 btw guys this isnt finished its just a little thing i did to make it try and look nice atm so dont go saying make it all devs first i did in a1...