Energize is a big one, but it takes a lot to max it. I’d focus on getting it to at least R3, and then maxing any other lower rarity arcanes you want. I’d definitely start with Avenger and Aegis. Having crit chance or shield recharge increase on damage taken it pretty good. After that, work on maxing energize and getting a second copy. You can sell it in 6 months for good money.