With these AC/2s all in the RT together, it's almost like having a Light Gauss rifle that fires every fraction of a second with no charge time... Aside from the significantly higher heat production, which is still manageable. Or you can chain fire them for excellent suppression.
With 4 AC2 on the right side, I would rather fit some backup weapons on the left side (so if you lose the right side, you won't be completely useless and you have sone sone brawlish weapons): ... Or simply drop with an XL engine for almost max ammo and alpha strike close range.
I tried the XL 280 version of this build and it's very fun, and a nice change since I've got closer range builds on my other Champions.