[Poggio]

XD I think I will tackle Smexy first since it is your current avatar. Disclaimer this is only my opinion you don't really have to do it or listen. So to me Smexy is a flash of skin, a subtle tease if you know what I mean. So unless you are purposefully going for Whore, sexy is about balance of what looks nice and what attracts. You may want to pay attention to erogenous zones. For me when I make an avatar I try to leave the chest open, the stomach or the thighs. If those parts are not open to exposed flesh then I at least build up the shape so that it is alluring. That being said I think you should think about what you find sexy in the gender avatar base you want. For me that is skin tight or skin... again the idea of a tease.
Now about your current avatar.

One... withering trees are not sexy to me. This may be my lack of love for backgrounds but hay withering trees DB...

Second I think you could use the flair with this item if you wanted to. You would have to just find a way to build up with it or use one of the poses that does not clash with what you currently have. Your avatar has enough pink and gold to balance out the pink and gold in that item. Which brings me to another point. You should stop looking at the items in general as what they are suppose to be but instead as parts. In some cases it is good to layer them when you want to have an theme but sexy is general enough that it can fall into anything. Right now if you are going for Sexy dragon-lioness you are close. The chest area is already emphasized and the belly is nice and exposed. I like your avatars face and hair already too. IT is mostly the over all build up. You could use a lot of things you listed as Armor to help build up and balance out your theme. Sexy is just that broad to work that way. Especially like mixing in the Divine Herald, A lot of these items have little parts that can be built into something better as a whole. I would try not limiting them to their original idea and play around with the way they layer on top of each other. The fun of this is seeing what exposes what. If you find something you like keep it in mind even if it does not work for your current avatar.
so all in all I would remove excess that does not add to the allure of sexy, and think about using poses outside of their design.