It’s hard to say, the I-2 is a top of the line shaft like the predators and OB’s so you can’t really go wrong there. Personally I don’t put a lot of stock in the low deflection hype and buy them primarily for the tip diameter, taper and feel. There are plenty of other people out there that swear by a standard maple shafts so I suppose it’s more a matter of what sort of feel you are looking for. If it feels good and inspires confidence yes you will probably play better but it’s the Indian not the arrow that is sinking the balls.
Will your friend let you borrow his I-2 so you can take some test hits with it? If so. you should know pretty quickly if it’s for you just by swapping shafts back and forth between the I-2 and your standard shaft.
Cheers,
Dave