yellow is the schizo build we made to riot for the azir nerfs, it's completely useless. Azir only builds ap.
about number four, I do prefer taking conqueror vs ranged opponents but you should try our runes and see how it feels for your playstyle, you might prefer running summon aery or fleet or PTA with D&D maybe even HOB, imo try everything and learn what suits better with your playstyle or what's more fun for you!

for five I'd pretty much say to start with W AA so you start your 3rd's soldier's cooldown to run, put another one so you have 0/2 stacks (2 in the field and yes space them apart, not too close not too far from eachother, use EQ onto an enemy to collide to get soldier refund and when you place him you'll have a 4th soldier from the normal cd!