Legend of Doom:
I fear is that it will get damaged transporting them to the gaming venues I go to.
Make a custom transport container for it.
Get a rigid container (e.g. food storage etc) that the model can sit inside without its wingtips touching the sides.
Cut layers of foam to fit the container. Foam cuts with scissors and can be glued with hot glue, fabric glue, or dedicated foam glue.
Stack foam as high as the wings. Cut an opening in each layer to fit the base. You want the figure's base to drop through this socket so that the wings are supported by foam and the figure can't move around in the container. It looks like the wings are irregularly spaced, if so add more layers on one side than the other and make a v-cutout if needed.
Make an additional foam stack up from the dragon's shoulders with a socket cut out for the rider to go up into, that contacts the lid of the container. Cut a slot for the protruding lance arm. If the rider is firmly enough on, you can simplify this by just stacking up from the rider's shoulders.
If you want specific support for the lance, make a separate stack of foam that sits on the dragon head and has a slot or v-cutout the lance goes into. I say separate because it looks like any socket you cut to drop the base down into leaves the lance extending into air.
Depending on how everything fits it may be worth it to glue the top stack to the lid.
Optionally, also make the lance detachable. Find suitable diameter tubing, cut say 5/8" of it, clip the lance with 1/4" protruding, glue the tubing over the stub. Now the tube is a socket the rest of the lance fits into. Paint of course. Remove the lance when transporting.
P.S. – Beautiful figure!