@Seth. I would say there is no silver bullet, it will depend on the company, fix prices, subscription level and also the motive.
So lets consider the 3 listings Indegene, TBO and Aadhar. I made 16, 16 and 7 BHNI respectively with final allotment of 0, 3, 0 applications. So if I wud have sold all in fix it would be 16*11000 + 16*10000 + 7*9000 = almost 4L. I plan to exit TBO fully today so 3.2L profit. While selling in fix would have made slightly better IR, it is also stress free. What if I wud have been allotted in Aadhar and not in TBO? it would have changed this calc entirely.
My motive currently is to maximize my recurring rate of return while the Primary market is hot. For long-term fundamental view-point I maintain an entirely different portfolio and it involves whole different ball-game (for eg I am holding all allotted lots of Tata Tech, Ireda, JSW Infra)