Personally, i would rate it best moveset for defense, but defense became pointless at this point, especially for double-weakness mons like dragonite with max. CP over 3000.
Not bad for attack, but i guess old DB/DC and new DB/OR and DB/H Dragonites will rule, raids will not stay this laggy for a long time and dodging will become more important than it is at the moment.
I have a SW/DC sitting at 3460 that i'm not going to touch, but maybe someday i will.