Eh, well come to DD, where the priest is actually the fighter, the fighter is actually the mage, and the mage is actually broken
On a serious note, Fighter gets better and better the more you play the game and unlock stuff (TT fighter can be beyond hilarious), and somebody once tipped me off about healthmonster fighters, I had fun with that too.
And on a more helpful note - the XP ability of the figter is obviously strong (it was buffed the last time around such things happened when people were complaining about the fighter). It's mostly a magic damage spiker ability (as it works with level cannons). The "free" DP is actually stronger than one would think - but it would take a textwall to explain exactly why - and it's a phys damage spiker thing (but it can also get you levels faster). The scouting ability is supposed to help with regen-fighting and save you blackspace but the right way to use it is the exact opposite of intuitive. It could've used a regen-fighting themed buff.
Otherwise a good use for it is to find monsters which are lower level than you to kill for Tikki Tooki piety, or even Taurog and Drac. Pretty niche, though.