so, in playing league, ive noticed something. percentages vs flat. armor/ magic pen, and movement speed. basically, for flat amounts, it will give you a base upgrade, but with percentages, it becomes a variable based on the amount that you already have. armor pen is more effective when the enemy has a higher armor rating, same with magic pen. but with movement speed, you start with a base around 315-340. so just having 3% on that will bring you up to 370, which is a base boot buy. basically, %ms is better than boots,so you can have an extra item space and still be faster than everyone.

the main facet of this build is the ludens. its a good item overall, but it gives 10% ms as well. which means you'll have 370 + 3. (10%)= 407 ms no items. most characters cant even hit 400 with full boots, so this is a great exploit. and if your team gets a wind drake, even more speed! no need for boots means you can save that 300 gold and start buying items, and you can have 1 more super item in your final build. you can only be ahead.

you might be thinking "well, why dont i just buy boots as well and be even faster?" lemme tell you why not. riot has placed a cap on how much raw movespeed you get after 415 or so, so any flat ms after that is diminished and will be wasted stat. if you do want more speed, go for a lich bane, thatll bring you up to 432 i believe, when it shouldve been 441. so yeah. fun build to try and learn how useless boots are! hope you enjoy~
(note, if someone rushes full boots, then realize ur gonna be slower than them for a little bit.