From what I can tell there isn't currently functionality to mount a specific token or tile via the token/tile ID or tag (from Tagger). Both would be very useful for making specific mounting combinations that are used repeatedly that could be triggered from a macro. Tagger integration would be the best.
Both a Tagger integration (has to be turned on, Tags have to follow the syntax "Rideable:{TokenID}") and a few macros that may be interesting to you have been added with v2.7.0
From what I can tell there isn't currently functionality to mount a specific token or tile via the token/tile ID or tag (from Tagger). Both would be very useful for making specific mounting combinations that are used repeatedly that could be triggered from a macro. Tagger integration would be the best.