Depends wether you have Light as a Feather or not, 30% is sitll pretty doable without it, I draw my limits to encumbrance without Light as a Feather at 35%+. If you have Light as a Feather at 10: ignore encumbrance

About pole arms and using lunge...I will let you figure that one out yourself. You should treat the weapons as you would in real life. So ask yourself a question: will I bash with this spear, slash at him or will I stab some1 with it?