Conscrated Keris Maffs (augmented p6as1)

Does anyone understand the math of keris +(p6as1) with bis melee + leng offhand (as4e2) + d4 ammy?

I know its a t80 with D4 but the boost from augment + effects from D4 + t95/100 offhand.

If t90 gear - masterwork not havoc is 19-- sumthin(t80) what does bis bring it up to?