Sen Triplets Esper, how do I do this?

Generally in EDH, just throw all sorts of esper rares into your deck. It doesn't really matter how much the Cmc is because edh will let you get there. If you want to steal all of their stuff I would suggest doing a lot of mind control effects and then use black to sac them if they ever try to take them back. Use white for big control fatties and also for your board wipes and then have fun. Mindslaver and sorin markov also fall under mind control effects so you could run those as part of a mind control theme. Edh is a fun format and you should have a lot of fun using cards that otherwise you wouldn't be able to use. Good luck!

I think this really depends on the local metagame.  Generally EDH is considered a casual format, where bigger spells can be played, but if you don't build with a proper curve you'll have trouble also.  I agree with running board wipes.  You'll be seen as a threat with this general because it is cheap to cast and aggressive.  Build a deck that can take advantage of the Triplets, but don't rely on them to be on the field.  You also have the best tutor colors and best artifact support colors.  Use those control and tutor colors to your advantage.  Desertion, Spelljack and the like fit your theme, and are some of those 'big mana' cards you won't find in other decks.  I also replied in the other forum where you posted with additional suggestions.