Your battery/tank will not explode. The maximum wattage your MVP 3.0 mod can go is 30 watts.
I use my Aspire Nautilus at around 15 watts. If I use it at >18 watts I start to get "dry hits" because the tank cannot feed juice fast enough.
Make sure to "prime" the coil by dripping 3-4 drops of juice directly into the coil before you fill and assemble the tank. Once the tank is fully assembled take a few unpowered puffs to make sure the coil is well primed.
Try your Nautilus at 8 watts and slowly raise the wattage until you find a power level that works best FOR YOU.