How can i destroy these ship class?

[HdS]

Thank you for the comments.
We play in late game, we use mostly baseships und dreadnaughts and alle technologies are avaiable.
Rockets are still useless because his pdc shot them down, before they can hit.I tried baseships with 25 rockets, but only one or two rockets hit.I use quantum reactos, but the ships are still missing him, because his enormous defensive skill make it impssobile to hi him from a far distance.
SHould i give my savegame to you? Then you can see the problem in the real game..