At that wattage and vaping frequency, I'd get at least three 2100 - 2600 mAh, 20 - 30 amp IMR batteries, and a 4-bay charger. Use the batteries in a rotation. Not sure they will last a full two years, but they should last at least a year.
Evolve, the manufacturer of the DNA boards, recommends using a high drain battery with at least 12 amps continuous discharge rate.
LG IMR/hybrid
LG18650HE2 2500mah 20A
Orbtronic IMR/hybrid
Orbtronic 18650 2500mAh 21A
Orbtronic 18650 SX30 2100mAh 30A
Samsung IMR/hybrid
INR18650-25R 2500mAh 20A
Sony IMR/hybrid
18650VTC4 2100mAh 30A
18650VTC5 2600mAh 30A
Efest IMR/hybrid
purple 18650 2500mAh 35A* (rebranded LG18650HE2 2500mAh 20 amp*)
purple 18650 2100mAh 30A (rebranded Sony 18650VTC4)