what do u think about cdr boots ?

i SMASHED a sett top with this one hahahahaha!

In what situations should you choose to not use cdr glyphs and to get morellonomicon over roa?

Hey, I have another question. I played a game earlier today as Lulu top where I ended up going 2/8/10 because the enemy mid-lane Fizz (who ended up going 10/7/6) kept targeting me in team fights. He did so much damage that I'd die before I could get my shield up or my ult. In that scenario, would it be okay to get some MR? The only other AP champ they had was "support" Vel'koz (got 7/7/15), but Fizz was really the biggest threat overall. Would it be better if I just stayed back and played extremely passively, or is MR okay in that scenario?
Or should I just stick with Merc. Treads and build then rest normally?

My item prioritization is garbage, so I have a few questions about the build order.

How important is it to get Rod of Ages early? If I'm against aggressive AD, would it be okay to get Seeker's Armguard THEN RoA, or is Rod just too important to wait? I know the 10 minute scaling is valuable, but say the enemy Lee Sin managed to get several kills before I can afford Rod, and is ganking aggressively. Rod or Armguard?

Also, would rushing Zhonya's after Rod and tier 2 boots be a good idea, or is getting Deathcap always more important?

Also, if I desperately need more durability, would it be okay to build Rylai's or Liandry's for the Health and AP? I know the slowing passive on Rylai's is unnecessary on Lulu, but 100 AP and 400 Health sound really nice. And say if the enemy has someone like Mundo, would Liandry's be a good idea for the M.Pen and Burning damage along with 300 Health and 80 AP?

Pardon me for my amateur-level knowledge of items. It's probably my greatest weakness in League.

Really good guide gj man. It really helped!