The suggestions all sound like interesting, valid options... but considering the massively larger amounts of SP that groups can already get over solo players, just doing things like this would only widen that gap and 'completely' destroy the solo game. As a game that's supposed to allow for either, they have to make sure that SP gained while outside of a team can at least remotely keep up with SP gained while in a team.

... of course, that's hardly even true right now XD. So we'll see how it goes. SP chaining for consecutively killing the same type of enemy can get pretty dull, but perhaps there are other options!