Nobody really knows who Ghost is except for a few people now. The cartel isn't after him...if anything he can link up with them because they want Lobos too.

At this point I think his biggest threats are Simon, Kanan and Greg (in that order)

I think the only person that can really outsmart him is Simon tho...they didn't touch on that but so much in the finale, but that's really who he needs to watch out for