My favorite thing to do with WMW is to wait a bit, then when he has an upgrade, I catch up on the like 80+ chapters that have built up to his rank up. Anyways, around the time his Bloodline is sealed is where I decided to wait and let the chapters build up. There's been like, 200 chapters since I stopped reading and I can't tell from the chapter titles what's happened. If Leylin has unlocked his sealed bloodline, can you tell me which chapter it is? and if he has ranked up since or evolved his bloodline, can you tell me what chapters those are?
I think you might wanna read to Chapter 786 – Arrangement. It's the end of the arc where he upgrades. I think the moment of upgradeing happens at 757/758 Edit: After that a new arc begins where a lot of stuff happens, might wanna try it out 'cause there's a lot of upgrading, just not how you'd expect I guess? I dunno, you'll see.
You have quite a bit to catch up on... Not sure what was your exact last chapter, nor which ones were the exact chapters in where Leylin progressed, but here is a general Arc outline (Copied from wuxiaworld's index) ARC 4 — PASSAGE OF BLOODLINES ♟ Chapter 629 – 786 ♟ ARC 5 — WORLD OF GODS ♟ Chapter 787 – 1043♟ Hope the general direction is enough for you to go off of.