Dual Blade Formula Question (Post-Chaos)

if it was a 2.5 modifier

i'm going to have over 300 total combined weapon attack when chaos hits and thorns gets 30att

jesus christ.
its attack*multiplier, right?

so what, that gives me... 750?

I'd be...

2.5 * (4*LUK+STR+DEX)*(weapon att / 100)

For max dmg.