Leaches vs Piety

Im getting 86prayer for special leaching. Im trying to see Leach defence/Leach attack/Leach strength Vs PIETY. IM wondering since Piety is a 20% boost for strength/attk/def and leaches are 10% though leaches take defence down 25% plus leach strength gives you 10% strength bonus and the guys defence is 25% LEACHED so doesnt that make it 35% strength bonus? I dont know . Please someone explain Which is better, LEACH ATTK/STR/DEF VS PIETY.

 

We've got an RS section, mate

 

well lets do the math, 10% for leeches + 25% for drain = 35% overall for attack defence str and even range and magic. with only a 16 prayer level difference from piety, it's well worth it. Though, turmoil will eventually overpower all prayers, but in my opinion, piety > leeches; ie dds dm's, etc