I've been using a Reliability Engineering + Missile Specialization seat warmer officer who gets switched out for the player once on the field. Essentially sacrificing a Officer slot for +100% missiles and +15% CR/+30 seconds peak time. The player character has C1B, C2B, C3B, C4L, C5L, T1B, T2B, T3L, T4L, T5L.
2 Plasma Cannon, 1 Hurricane MIRV (20 total), 3 Sabot Pods (72 total), 2 Longbow, 4 Burst PD Lasers (left side), 8 PD Lasers elsewhere. Hardened Shields, Integrated Point Defense AI, Integrated Targeting Unit, Resistant Flux Conduits, Auxiliary Thrusters, rest in vents. Make 3 most expensive mods as S-mods out of that.
Early on, I focus on separating and eliminating frigates/destroyers to prevent them from getting to my backside. I always keep the fleet to one side of you, tripping each other up ideally. Once the small fry are dealt with, I spend a lot of time dashing then venting against capitals. Anticipating which direction you need to be facing before hand is key, which often results in weird approach vectors. 3 dashes in row will basically take you out of the range of anything worst case, although ideally smaller dashes and short vents are better. I also tend to move to middle left side, then proceed down then to the right (counter clockwise) to help keep one side clear.
You could be right, the level 8 officers vs level 6/5 officers, plus Radiant versus Conquest or Onslaught is likely to be a step up. It'll be interesting to try though. I know I've essentially soloed Radiants by themselves (Pair of Paragon anchors with herons holding a line while I'm off playing around in the Odyssey), but the entire focus might be rough. Depends on how well I can spread them out.
Edit: They might be slightly less tanky (as incoming shield damage is higher), but their own damage can burst much higher because the free OP can be used to combine missiles with plasma. 10 sabots + 1 Hurricane MIRV + Dual Plasma cannons will essentially delete anything of cruiser tier and below very quickly.
Edit2: And yes, that is a fleet of s-mod Revenants for taking the loot home.
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