Can we get Jump Potions for our Retainers?

[JMadFour]

Different roles bring you different items. To be able to just switch a retainer from lv 70 DoM/DOW to lv 70 Miner or from lv 70 Miner to lv 70 Botanist would be a bit OP.

But it shouldn't be a problem to switch a lv 70 MNK to lv 70 AST, because all DoM/DoW retainers have the same items they can collect.

OP how? How does not having to level your Retainer from level 1 repeatedly give you an unfair advantage over another player?