If you want a linear slope I see no problem with Shape bender.
You will need some extra plugins:
-BZ tools
-Weld
#1 draw your three arcs
#2 weld them
#3 select the resulting curve, in context menu choose BZ convert to, choose polyline segmentor, choose how many segments.
#4 select your curve, in entity info look at its length, let say 1000.
#5 on red axis draw a triangle length 1000 height ,let say 400 then make it a group.
#6 on red axis draw a line length 1000.
#7 apply Shape bender, note that you may have to use arrow keys to get the result you expect.






