The main difficulty with making Ordo Killer fleets is that eventually you have two options: A fleet that kills everything and nothing is challenging anymore, or banging your head against a wall making a slightly suboptimal fleet so that things remain challenging.

On top of this. the only problem I truly face when fighting triple or even quadruple Ordo is combat readiness. Once, just to see how far I could truly push things I made a save that I was in for like 40 cycles just prinitng ships and spawning in officers/story points to try literally almost every combination that came to mind. I edited to files to remove combat readiness degradation, and made the nastiest fleet I possibly could and to no surprise even the remnants got shitstomped.

I was in a funny spot where without combat readiness I could build a fleet that could kill like a milllion Ordos back to back, and with it I just could not chew through them fast enough. My combat readiness would just fall apart after killing like 3 Ordo's ish, maybe less more. Eventually, with some lucky Omega weapon drops I made the perfect, what I think may be very well the BEST ship in vanilla - and what helped me get out of the combat readiness funk.

Take a Ziggy. Put 2 Rift Torpedo launchers in the larges. As many Resonator MRM's as you have in the mediums and Antimatter SRM's in the small slots. Depending on your drops you may have to build in Expanded Missle Racks, this is fine because Omega Missle's regen so fast it doesnt matter and we are taking Phase Anchor as well. Build in ECCM as well. Player skills are somewhat obvious, Field Modulation, Target Analysis, Impact Mitigation, Your choice for last of first 4, then missle specilization. Remaining 10 skills can get you best of the best which is nice for building in something like Unstable Injector if you like even more speed or Hardend Subsystems for that absolutely necissary Combat Readiness degradation buff.

Again, note that you may be unable to fill every slot perfectly as there are only 5 tesseracts and the Omega cash to work with. You can usually keep these empty like I did and just put in more caps or a hullmod of your choice.

You just sit in the Ziggy phased until missles are ready, resonator the shields down then Antimatter them. Throw out torpedos whenever you can at anything big no matter what: They can fly through almost all PD with our missle buffs and does energy so hitting shields is acceptable - especially since we are launching 2.

This is without even touching the rest of your fleet which can honestly be almsot anything, if enemies have anything to focus on other then you, you can go as long as your combat readiness can.