I'm sure any conditioner would work. I don't do glosses. They're not enough color for me. I am a dark brunette with about 20% gray that I like to keep as deep-dark auburn streaks, so I use high-dye-content henna full strength and leave it on for 4-6 hours to get it that dark.

Claudine was using henna glosses on her natural strawberry red hair to perk it up a bit, so maybe she'll chime in here on conditioner choice.