Meth an nitrious? Or not?
I would KISS, pick one, and see what you can get out of it.
I'm definitely not an expert, but N2O worked excellent on a couple of my friends that tried it on a boosted combo.
Even tiny 50-100 hits gave some amazing gains on blower cars.
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100% meth will certianly help, mostly because of the octane added to the mix.
Both require tuning and do add some variables to the tuning but nothing too difficult. If you have, tell the tuner your working with and see how he would like to go about it.

