I tried using Radiant as a flagship, but it is only overpowered if I also get Systems Expertise to let it teleport nearly at will. Even then, Neural Integrator that costs 50 OP means that it offsets the OP gained from s-mods, and I get energy weapons. Meanwhile, I can get better performance from Ziggurat with less skill investment. If I want an overpowered godship, Radiant is a chump compared to Ziggurat. What I do with Radiant with Systems Ex. is teleport to run away when it is unsafe then teleport toward an enemy to ambush when it is safe, and it can be draining on PPT.
If I try to use Radiant without any Combat, it is very sluggish like other battleships. Without Systems Expertise, skimmer does not recharge fast enough, and the enemy will catch up if trying to run away with Radiant. Radiant felt like Paragon with less shot range and more missiles, if I get missiles, which is not a given with that -50 OP tax called Neural Integrator.
Neural Integrator should be removed and let Neural Interface work on everything. I would also prefer Neural Interface to cost 0 OP if it has to be kept to mark ships.