User blog comment:BIA-Kaboose/The Sheep are Everywhere/@comment-11092721-20130917100414/@comment-6000413-20130918095236

But if instead of soraka he had some strong tank with him, something like udyr or cho, he could have built blue, dealt good damage, and left some money (minions, less wards, gp10 items instead of more wards, ecc..) to that tank and restore the balance: a kiting unkillable ezreal dealing less damage needs less protection and sustain than a full-adc ezreal, thus letting the not-so-much-support be tankier and deal more damage.

Sure, if you use with him a soraka they might do well in lane (sustain, mana to constantly poke), but in teamfights? both would let the rest of the team die while they deal less-than-average damage.

What I say is: you cannot change the meta alone (and with meta I mean team composition, not the champs you use in a particular role), you need to counter-balance these changes and have some stuff in the team that you need to win: cc, poke, initiating power, damage, tankyness, escapes. I'd say you need at least 4 (5 would be better) in your team. Once you have them, how you get to have them is not so important, actually.