In Tier 10 100% diversity is the way to go because the nodes are not very difficult. That being the case, it would depend on your alliance/BG ranked up defenders.If you are looking for blanket great defenders I would check out some high level alliance war videos on youtube and look for trends of commonly placed champions. Just be careful to keep in mind some are common right now due to the current defensive tactics. Not a very direct answer but if you post some options I would be happy to lend an opinion.
Out of those I would go Mojo and Annihilus. All three are worth the resources for defense. In my opinion they will have a place on the map for the foreseeable future.