In the 29 I go with 1xET, 1xER, 2x77 and 2x73. The 77 I see only good in WVR combat where the adversary would be expecting your 73's which are becoming more flare-happy as DCS evolves.
The J-11 I don't fly. I stick to stock 27/33 again due the silly range of the 77. The ER might be less resistant to chaff/notch and often goes dumb off the rail but sometimes tracks like a shark smelling blood. Having more of them on board definitely gives safer options in BVR.
Ummm, that's debatable..