I haven’t been able to make this (Glaive Prime) SP viable since I suck at modding, what to do?

I’m guessing that the build I found is outdated, how should I build a glaive?

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Yeah, this is an old build but Tadiken is right about Amalgam Organ Shatter. Miniscule critical damage loss for a lot of comfort. 3.8x multiplier down to just 3.7. I'm pretty sure attack speed mods like Quickening/Fury don't apply to glaive throws, but they do obviously matter if you want to use it as a hybrid light/thrown weapon.