Use a normal Great Scythe + 15 instead of Lifehunt.
As for BKS weapons you can't go wrong there. I would also recommend Man- Serpent Sword, at +15 of course.
Although the most fun i had in Souls games was as a simple Longsword and Mace/Reinforced club plus Heather shield user. Even in PVP i was constantly underestimated. The only downside was that i had to have 40 in STR and DEX to deal enough damage compared to other weapons.
It was more of a weapon master build, since i could effectively use almost everything.