It's hard to get past all the marketing guff, What do I need to buy that will let me kite in 7 knot winds?

I'm ~85kg and have a 2012 12m Fuse kite and Cabrinha Chopstick 144 twintip. It's usually not a lot of fun unless there is whitecaps and 15-20knot winds. I can sucessfully tack or jib but it's been ages since there was enough wind to attempt jumps (usually at Elliot heads Bargara).

Should I just persist till I get better and can make use of sub 15knot winds?

Sholuld I buy an extra kite, it seems that the larger the kite is the more wind it can catch and the less knots I'll need.

Should I buy a different board? would it be easier with a larger or a race style board? So that there is less drag on the water once I'm moving.

Or do I just have to lose weight?