main distinguishing quality of this weapon is that it has a higher poisebreak than (as far as i know) all other halberds, at 45 (30 being the norm). this is a firmly substandard halberd build and mainly serves to fish for stun backstabs against people who are unaware of both how to avoid them and of the weapon's higher poisebreak
switch to eastern gauntlets against greatswords
if you prefer sl 135 raise vit to 50 and str to 26 (it's a bit more viable at that level)