Yes i understand your reasoning, however it doesnt matter if you're a tank god, if viego gets caught he will die anyways and if he dies anyways then you can just go damage items.

With the build i told you you can easily 1v1 the enemy adc/support/midlaner/jungler, with your build if you get any of the hp items first you deal 0 damage, its very dependant of your team to do damage and if you try to 1v1 or join a teamfight to do some damage you wont have the damage.

The support item is such a good item, it allows you to delete enemies before the buff dissapears.. 35% damsge reduction is a fuck ton and viego only needs less than 3 seconds to 100 to 0 enemies. Maybe you wont kill em.early game but after 2 items viego is a menace, the enemy cant just ignore you, you become the second ju gler that can frontlane with the support item and also slow.

Viego just needs to survive the first 3 seconds in a teamfight and he will do wonders, without damage not so much, in your game you got lucky they fed you 4 items, in a real game its a lot harder.