Add your top picks to the bag in your size on the evening before a sale's early access opens, so you can pay in the first minutes while common sizes are still in stock.
In a fashion sale, stock runs out size by size, and the most common sizes go first. As a Myntra Insider, you can shop major sales before they open to everyone, so use that window for anything you need in a common size.
For the End of Reason Sale, Myntra also sells VIP access, and Insiders pay less for it than other shoppers. It adds extras on top of early entry, such as an extra discount on popular brands during early access and VIP-only weekend deals. The brand discount runs only during early access. Buy VIP access if you will place your main order in that window, and check the bag total to see whether the extra brand discount applied to your items.
VIP access at the End of Reason Sale also takes extra off prepaid orders. Pay with UPI, a card or net banking instead of cash on delivery to get that extra.