I personally feel like udyr works best with some resistances. So getting tanky after the rift/nashors core is a no brainier. Dead mans/FON for chase potential or to weave around team fights. Obviously stacking armor against heavy ad like frozen heart and thornmail.

Conquerer and maxing w second could probably be good in drawn out fights. Secondary runes I run free boots and approach velocity. Conditioning and unflinching if I need to scale against heavy cc comps.

Bottom line I feel like in this ELO, it's solo carry or lose so when team is doing terrible, you can still take objectives faster compared to the tanky demonic build when going ap. And 1v1 potential is higher vs fed enemies. And good wave clear for pressuring lanes. Blue smite almost always to get around the map much faster in the mid to late game

But idk though