Beastmaster's weapon?

[Iscah]

For one, any "cool" shield design BST gets will immediately cause PLDs to declare that they should also get that shield design, and vice versa.

On the contrary, the very simple solution to making BST an axe+shield job would to just let them directly use the same shields that PLD already has. Some are already shared between PLD and mages at lower levels, so they don't have to be linked to the job.