That’s what’s nice about the build. The legendaries are just icing on the cake and not necessary. Nova shield and tesla grenade can be found in vending machines, chests, or drops (although Sunshine is a quest reward). Too Scoops and Fridgia are quest rewards and their levels almost don’t matter because you’re using them to freeze not damage. The Chronicler of Elpis mod you have is great because of the boost to Optimism and increased freeze chance (or the Celestial Doppleganger if you get lucky and find one).
Also, it’s worth it to “reset/recall” his Action Skill before it gets below 50%. Above 50%, it seems like you always have the same “minimum” cooldown based on the # of players in the game. 1 player = ~8 secs, 2 players = ~4 secs, 3 players = ~3 secs and 4 players = ~2 secs. So, there is only a few seconds when your DJs aren’t out that you have to play a little defense.