Yeah...unless it's Aux Lots' follow up hero, if that's the case said hero's boots should have attack as main stat. Imaging AUx Lots S2 into a 5k attack Ludwig.

Speed is just such a dominating stat in most of pvp these days.

Counter sets/counter heroes, unity sets/dual attackers, and Durandal/heroes with the durandal effect don't need speed either. That is by no means a small amount of heroes, 

The only mains worth keeping on boots are speed/atk/hp.

Ah i agree having speed is important. but the average 20 speed from subs has always been enough, imo. I prefer cr boosters in pvp and have an sss schuri. 

not saying a 14 speed imprint is necessary, but giving up speed main isnt so important. 40 speed isnt more valuable than 60% or 65% x stat on T2 or stall heroes. I rather build speed set with speed subs and use my mains for more valuable things.  for example, i have speed set with health main boots on my krau. 143 speed, 24k hp, 1.2k defense.

I know every built in counter hero: Ma.ken, C.erato, Purrgis, Violet all would appreciate Hp boots also. Yuna unity (yunity) i have on double attack, crit. d with 136 speed.

I'm not sure how ravi's or kens are built. Anything goes as long as it has health.

Cr cleave comps usually have a dps with minimal speed.