Whats limiting the number of tracks?

A good recording can be done with just 2-3 mics depending on what sound you are looking for.

The Tascam US-122 only has two inputs, so it limits the tracks into Sonar.

It sounds to me like you have plenty of mics, you just have to get a good mix on your Yamaha mixer. Easier said than done, of course.

You haven't specified which Audix mics you have and where you'll use them.

You also haven't said what the drum kit consists of. For example, if it's a 5 piece with 3 toms, I'd lean towards micing all the toms individually and not using a hi-hat mic if you're short on mics.

Read up on methods for setting up the overhead mics to avoid phasing and getting a good stereo image if you haven't already. x/y is the most basic. You can get decent drum sounds from just overheads and a kick mic. Focus on these for your mix.

I'll be using an "Audix Fusion Series 6-Piece Drum Mic Pack"(not the greatest but I'm poor and I can use these for free) I also have a Shure SM81 to stick somewhere if I need it. The set is a 4 piece which consists of Snare, tom, floor tom, kick. Plus the regular Hi-hat, crash, and ride.

I should have plenty of mics its just a matter of placement.

if you can't get a good sound with those mics, something's wrong. They're not the best, but they're damn good, especially for the price. Make sure your drums sound good 1st and foremost. Play around with mic placement and the room around you as well.

Have you considered renting out a stand-alone recorder with 4-8 inputs? Shouldn't cost much (>$50 for sure) to rent for a day or two and will give you MUCH more flexability than a 2-track stereo mixdown for your drums.

I often have to run my mics for the kick drum, overheads and snare etc. through a mixer - level it all and run it into a stereo track. Play around and get it good.