Health Regen Quints/Seals on Garen

tried my hardest to google this but couldn't find any up to date info on it.

my question is, has anyone ever really tried going with full Health Regen on seals and quints? I figure the usual on Garen for seals is Armor, Quints are move speed, AD or armor pent, but just from my modest amount of experience with him i'm curious if taking regen could be as good of an idea as I think it is for early/mid game. i'm sure we've all seen his ridiculous amounts of regen late game on a pretty tanky build, especially with 's passive.

basically for seals, scaling is 0.11/5sec per level(1.98 at 18), while flat is 0.56/5sec. Quints, scaling is 0.28/5sec(5.04 at 18), and flat is 2.7/5sec. now i'll be the first to admit I still consider myself pretty new to the game, and that's why I'm wondering everyone elses thoughts, could this beat out the benefits from the usual armor/AD combo? is this more common than I think it is? And finally, if it is viable, thoughts on scaling vs flat? i'm almost inclined to choose flat, only because of how great his regen is late game through items and his passive might make the extra 33/5sec somewhat obsolete.

let's just for an example with this use a pretty basic build, like / > > > > >

Thanks in advance, apologies if this is somehow a dumb question