More than 200 actions gives a WAY Better chance of drop but it's random, that just increases the chance
It's completely random. On my old account I did three destroyers to get armor and with like 20 actions each. My NML however, took like, 15 with around 125 each.
Well... It's not "completely" random. Hit with high troops and use many actions... That will increase your chances, but nothing is guaranteed.
And then you'll have the times where you're top actions, high level Estocs Edge, and you'll get nothing. 910 actions on my last TGL, second in plunder. Active the entire time, level 4 Estocs Edge. Not a single drop, not even Inferno. Granted all I need from there is the Bow, but still. Bottom Line: Pray to RNJesus
I heard a rumour that you need to be naked then do a handstand, insert a feather into your rectum, and sing I'm a little teapot while you unload your troops greatly increases your chances ! Don't take my word for it though but hey if it helps by 0.000001% then it's gotta be worth a try huh๎