I did some tests to figure out which booster was the best by putting ramp as low as it can go and putting on omeglider, superslide, and the omega boosters. These are the results:
solid booster (the 4 booster): 4905
balloon mkII (the single booster): 4131
ogmega drive (the toggle booster): 4814
So i would use the 4 boost thing because it is the best one, if you dont beleive these results go try it yourself.