artilery need fly or walk ? please explain this to me.

im very confuse for artilery mobility.
why need fly than walk? what the reason ?

artilery have same booster power as air tipe ?

Because lands can om nom nom you easier on the ground.

everything has the same flight speed
only lands have bonus walk speed

while we're on this subject, what's the final wlk breakpoint for non boostrun non-land

35 wlk seems to be it.

I think 33 is the second last land wlk break point for non land.also depends on the bot.like some arts are better wlk based (monica) while other work better with fly.generaly if your tuneing a art youd want fly.