Duo mid/top is oppressive
Because most players don't know how to respond.
Because most players don't know how to respond.
I played top Leblanc vs a Garen/Galio(w/ smite) duo.
They ended up with 2 useless feeders and we had a very fed LeBlanc.
The end.
Because most players don't know how to respond.
Its because its a common clowning method that might as well be pulled by fiesta running players or just stupid opponents. Its likely going to result in 2 champions on the enemy team playing 'support' while the jungler gets free reign, but its likely going to make the 'solo laner' on the enemy team get starved quite hard, until the enemy team's jungler is easily mopping up rift herald and dragons and then using those to easily split push other lanes into submission while the team with 2 'supports' will likely may get something like superior map vision, but will probably not have as many strong champions for team fighting and require some fiesta'ish tactics like blitzing turrets and ambushing.
Though i would not say its a bad idea but its not a good idea either, it mostly depends if said team knows how to get it to actually work that matters.
[zombie-brand-clap]