Stranger commentary on the play styles of the mains is that each one has a pretty direct strategy to counter its...erm...counter.

Lightning's constant attacks and bloodthirsty lets it rip through wind clones like nothing.
Earth's turtling shields is the antithesis to lightnings bursty early damage.
Water's easy poison activation goes right through earth's shields.
Fire can out-control water if talented to do so.
Wind throws up a huge mount of * clones to absorb fire's control (that said wind still feels a bit weak in this match up since fire's AOE can just demolish a clone defense).