Complete Guide To Invasion Onslaught For Lux, Ez, and Syndra!
So I read a few guides, and while good, they offer poor builds for Lux, Syndra, and Ez. This guide will add on to this guide here -> https://boards.na.leagueoflegends.com/en/c/gameplay-balance/KFaAxs9y-complete-guide-to-invasion-onslaught-to-all-extents-s-on-all-5-core-missions-obtained
I think the guide is pretty solid, but lacks for the 3 champs I just mentioned. So lets get to it!
Ez, he is the Simplest to me, pack on Full lethality runes, scaling blue cdr runes, scaling health yellow, and build all lethality items. This way you'll stay relevant, 40%cdr and do tons of damage!

Syndra, I pretty much do the same build, except I go
first with stone born pact. Syndra's only job is really to knock enemies back and slow them. With the stone born pact, your allies can heal off the slowed and cc targets. Syndra is now, well, a more efficient healer!
Lux, as a disclaimer I main this champ. You can actually do many things with his champ. In my opinion, Stone Born Pact, is simply broken on her for this game mode. Toss down E and everyone heals! Snare two targets? Heals! Get a
Heals!
My favorite for this champ in this mode is on hit stone born pact. You do the Ahri adc build as Lux. You leave you E for as long as possible for allies to heal as you aa enemies. The next option is stone born pack into the syndra build, add 20% in cdr runes so that you can have 40% cdr. Lastly is the all support. Ardens, knight's vow, warmogs, cdr boots, stone born pact. You can if you want, swap warmogs for athenes so you can do extra healing. This build is all about healing and buffing. Usually you use this if lux is the only support.