I need help with unlocking the last Hunter Exotic helmet I need

[red coral]

For some reason Assassin's Cowl hasn't dropped in about 3 hours of Master Lost Sector runs, in the mean time I've gotten multiple rolls for every other helmet. How else can I unlock it??

[narrow blade]

I think you can get it from shadowkeep campaign

[shell ether]

Don't run masters, it takes way longer to do than legend, it gives a small extra percentage sure, but running legend is far more efficient

[plucky yarrow]

Shadowkeep gives you Assassin's Cowl for free

It's a dog waste roll from SK, and you have to play through SK, but hey, you can get it that way

[rugged schooner]

as Spooky mentioned, you have to complete the campaign on your hunter. Unlocking phoenix cradle and stormdancer's brace is the same for titan and warlock.