Quill of Ibis vs Maniacal Harm for pvp dt

Which one of those 2 weapons is better for dt in pvp?

Quill of Ibis: 116.3 dps (123-197), 40 crit rate, 61 crit dmg rate, 66combat rate(cold,electrical,holy), 40health tap rate
Maniacl Harm: 123.0 dps (147-192) 56 crit rate, 63 crit dmg rate, 244 combat rate(unholy)

I ask cause maniacl harm overall seems better than ibis cause or unholy cr, more crit and more dps and the reason why i even bother trying to compare these 2 is cause of bell's myrth gem which u can put in ibis and gives u 1400 spell penetration(down from 2800). Harm uses black gem which gives u even more crit or more unholy dmg. Furthermore bell's myrth is purely luck based, whereas black gem bonus is constant. Can someone please tell me which one and why??