Thanks SE for adjusting Trust Companion's Exp gain by doubling the amount.
Now Players only need to focus on 1 Job to max 3 Trust companions to lvl 80 with each character will gain 1 level for a total of 3 runs (2 runs only for level up if enough exp is carried over)
Trust companions will end up leveling faster than your character if you don't have that extra 50% Blue exp bar bonus.
Now all remains is to add maybe some more interesting things into Trust system later.