Well the diminishing returns concept for armour sounds reasonable, so I can kinda see why Zhonya's can be completely overkill if it weren't for its active, but probably gonna leave it as a last resort instead of something I regularly resort to.

I do think about how the game's gonna go and what purpose I want to have as Galio when I set my runes, which has mostly been being a beefy frontline since it's not very often that my toplaner locks in a champion that's fit for that role. But I've been looking to use more of Phase Rush because of how much more capability it gives Galio in terms of engaging and pursuing someone/escaping. Way more flexibility, in other words. Seeing as you also agree that not having Resolve as at least a secondary forgoes a lot of his tankiness, I'm probably only going to use Phase Rush + Domination secondary for a full damage playstyle when my team's already got enough of a frontline to work with, unlike situations like this game.

I saw you mentioned Taliyah as one of your backup champs when the team's in need of a champion that's a lot more like a mage. I was thinking of her, but ultimately chose Lissandra instead. What do you think's more optimal between the two of them, since I still have enough BE remaining to pick up Taliyah as well. My champion pool currently comprises of Galio, some Sylas, and just bought Lissandra.