ocean drake: buff it or remove it

or maybe nerf the other ones

The idea of it is sound. You gain sustain for extended tower sieges, and an early ocean dragon is a boon for solo laners. The problem is, it falls off horrendously when compared to the other dragons. Cloud Drake becomes almost stupidly strong for map control and objective contesting. Mountain Drake makes tower sieging not have to go to the lengths that ocean drake would allow it to, and makes split-pushing champions feel like overbearing monsters. Fire Drake...well, I think that one speaks for itself.

Ocean drake should have it's own niches like the other drakes do. The problem is, the other drakes step on its toes too much, and they all scale ridiculously well compared to it.