Well if it looks like the laning phase is gonna be extended then u can afford to get the kages. But it's pretty crucial to have dfg, sorc, kindle by the time u guys are grouping.
But i also wouldn't even think of finishing wota till i finished dcap and mogs.
I only like going wota (cuz hextech is good during these situations) when i'm against a lane bully like lee, olaf, or jayce. Helps keep u in lane. Otherwise wota feels really lackluster with the strength of other options available now. Like with dfg, visage, mogs, dcap u become an unkillable tanky dps beast. I'm finding it harder to fit wota into my builds. Half the time i just go hextech and forego both kages and wota till i get the rest of my build.