if i set the wattage setting on my mvp to 9-10 watts would this be ok to vape on using the kanger prebuilt 1.2 ohm dual coil?
Yes. It *should* be fine. But to me on the prebuilt coils, it's not so much if it's "okay" but rather if you get the desired flavor and vapor output that satisfies you.
With that said, I've yet to own either a KangerTech or an Aspire tank that I can consistently vape on at 10 watts or higher. Their coils simply don't wick up the e-liquid fast enough for how *I* personally vape so after the 2nd or 3rd hit at 10 to 11 watts they start to taste like what you might expect dirty wet carpets to taste like YUCK! A shorter inhaled vape though at 10+ watts usually yields okay results where as a long 8 to 10 second inhale produces that dirty wet carpet taste, but I personally like to vape about 3 to 5 hits almost like chain smoking and then I don't touch it again for a few minutes to let it wick up more liquid and have found it's best *for me* at no higher than 9 watts with the e-liquids that I like to vape on.
So, anyway, yes, vaping on 9 to 10 watts with a prebuilt kangertech 1.2 ohm coil shouldn't cause you issues on your MVP 2 it's protected to not allow you to vape a too low of resistance coil and the manufacturer obviously deems it safe enough to use at 11 watts.