[@Vertigo] WARDEN battlemages unlike regular mages [i]are[/i] still trained soldiers. They are generally more than physically capable, especially compared to your standard soldier, but not as much as more physically inclined WARDENs. They're also versed in things like rifle marksmanship, hand to hand combat, etc at least to the level of a regular soldier 

As far as power scale goes, something akin to a DnD cantrip that a battlemage can expect to use regularly like a 'basic' spell, would be shooting a small bolt of fire or propelling a chunk of metal with the force of a bullet. Generally, imagine Battlemages to be the WARDEN equivalent of Anti-Tank soldiers or a one-man mortar team, you can blow up a tank or a small building with a decent amount of effort, and if you [i]really[/i] tried you can cause an amount of destruction akin to a heavy artillery piece or missile. 

A WARDEN battlemage will typically supplement their niches with a variety of other spells and abilities, they can feasibly dabble a little bit in everything since they have the Mist capacity for it- but its generally a less practiced ability. They probably took a basic course in stuff like healing magic or barrier creation, but it isn't their focus.