what axe is suitable?

[Urthdigger]

I dont remember if the older dungeons give soldiery, but you can probably purchase the soldiery weapons once you hit level 50 (Weathered Conquerer ilevel 100) , which will make tanking a lot easier. It will still be hard though since most people will probably double your ilevel.

Even if he could, there's the ST/SCoB tomestone he'd need, so not an option.

I'd say hit the MB and snag a giantsgall axe. Level 70 and quite cheap due to common materials.