Just did a bit of testing with the same equipment on two characters, one equipped with BotEP, the other Tidefall, the rest of the equipment listed in my Semi-Lady-of-Pain build above. It seems that against quick-to-kill trash monsters, the BotEP is better, because of the attack speed increase, but as soon as monsters with higher endurance pools come along (ogres) Tidefall starts to catch up. Against dragons, I have no doubt Tidefall is much superior because you can put Beast Slaying on there in addition to a Lash, and dragons have a huge endurance pool. By the way, I tested these guys in a full party (which I call Uber party) and the 2 test chars had a constant MIG of 24, which increased to 27 with the Caed Nua resting bonus.