This seemed to really help me out. I was getting confused with the math and upon using that calculator I was able to determine I was just under lvl 6 and needed to put a Harrington waist on to make the BP. Thanks!
this is a neat little app. however i personally prefer to calculate weapons that have attack speed suffix myself as opposed to relying on their rounded number (ie. weapon with 1.1 aps and 7%ias, i'd use 1.177aps over the listed 1.8aps)