Sintropy

I'm thinking about trying out a Dark/Dark defender. From what I gather, Dark/other or other/Dark can yield more optimal pairings, but I'm more interested in the thematics of Dark/Dark. I've seen Dark/ and /Dark guides from recent issues, but the last Dark/Dark I see was from I6.

Has much changed since I6 regarding the Dark sets, individually or synergistically? Or is the I6 guide from BlackestNight for Dark/Dark still pretty good?

Certainly not, the set works well together, incredibly well if you are looking for a thematically natural origin character.

There is very little set synergy, however. The MA powers don't take advantage of WP, and vice versa. The only, and I stress that this is MINOR, point of concern between the two sets is that your big survival power in WP (Rise to the Challenge) depends on keeping foes in melee range, and one of your MA attacks (Crane Kick) will knock an enemy out of its range. But as I will stress again, this is a minor concern.

So basically, you can read one or two guides about MA, and one or two guides about WP, and you are set.