Astro is a brilliant mod! Hard hitting and smaller in size compared to a Nemesis.
I would rather advice you to go with 28 AWG 10m .. it's the best for flavor and vapor production in my opinion. Whenever you have to rebuild a coil, you only use some 4 inches of wire (in case of single coil). One coil goes fine for a couple of weeks if the juice is of good quality. You can do the math and see how long will your 10m last
KF lite and Magma are both pretty good, should get both.
18650 Batteries - SKU 1659701
18650 Charger - SKU 1765202
Make sure to put your batteries in a totally separate order because batteries will take from 2 to 3 months to reach you.