The atgeir is great. It's a good alternative when 1h&shield gameplay becomes stale.

The secondary attack is great against groups of enemies. For those running out of stamina while using it, you aren't really supposed to keep spinning.

A spin (which staggers most mobs) followed by a poke or two then strafe backwards (to allow the mobs to regroup) then rinse and repeat. You can safely deal with packs of fulings or even fuling berserkers this way. It is basically a kiting weapon.

Also, it helps to eat proper food instead of just cooked meats which don't really give you alot of stamina.