[1.2.314] Battlemage Job

In regards to that lvl 131 battlemage video...

In case any of you didn't catch herr equipments:

Cape: 6 int, +9% int
Shoes: +3% int
Gloves: 10 int, int +4%, int +4%, HP +6%
Helmet: 31 int, int+4%, int +6%
Staff: 6/101 int/matt, int +9%, (something) +6%, (same something) +6% <~ I'm assuming those are magic attack +6s
Earrings: 3 int, int +9%, int +9%, luk +6%
Top: 4int (nothing special it seems)

So yeah.

Holy hell.

Question: is the % boost additive or multiplicative?
I.E. Will int +10%, int +10% on equips give you int*(1.2)? Or will it be int*1.1*1.1?
If it's additive then she has int +51% from the equips I was able to see...hot dam. She didn't hover over her bottom or her shield.
If it's multiplicative then she has +73.36% int 0.o

There's also those few +%s that may have been magic attack but since I can't read that language's writing I'm left out on that info. So yeah~ Hot dam.