Once the you practice it a few times, the pattern is pretty easy to get down for tanking Garuda+Suparna.

The very first double ww comes after Suparna casts friction, so as a PLD I use rampart+foresight and flash for the chance of a dodge.

All add phases after that, just pop rampart+foresight shortly after Garuda spawns the tornadoes and they will still be up when ww hits. Of course you also use flash for these too.

With this method, bulwark and sentinel are still available should you need to eat another ww due to things going wrong, or you can alternate them on add phases for the additional mitigation if you need. Also Stoneskin yourself when possible.