Darkmatterhorizon

I'm a fan of Molniya orbits for my Kerbin comsats in RT. They are extremely forgiving of not being perfectly aligned, since most of the time spent in each orbit is above the KSC horizon, you have to seriously get out of position before you need to adjust anything. Most of the orbit is high enough above the Sun-Kerbal plane that you'll need fewer batteries for the darkout periods. You also get a decent amount of overlap with three orbits, so even if you do get out of position or run out of electrical power without noticing, it's likely that you'll still be able to phone home on one of the other two sats.