In Normal SINS Game w/out using any mod, i would counter it differently although each factions i choose would suffer some loss if not a major loss..
I bring it's Titans first head on first which i concentrate all my firepower and abilities on destroying Hoshiko's 1st if i can't destroy Dunov first..
With Ragnarov Titan, i reserve Scattershot and aimed at it with really close range, say near 2000 range and blow it up.. It got stronger if Ragnarov are level 6 which gives Overcharge abilities.. While Ragnarov take the brunt of the damage, i sent at least 3 Marza level 6 within range and unleashed it's Missile Barrage ability consecutively which greatly destroys any cruisers within range and weakens capital ships.. I make sure to upgrade each Marza with 2 Incendiary Shell level at least..
When all is done, i direct all fire on surviving Capital Ships and Ankylon while i send some Dunov or Cielo's for short recovery.. It helps a lot if anyone managed to micro-manage some ship to certain limits while keeping them alive..
For Vasari factions it might be a little different although almost the same way with using it's Titans to take full brunt of the damage while having at least 1 sikantra carrier with Repair Cloud ability reserved in the back and 2 Kortul Devastator with Disruptive Strike and Power Surge Ability included supporting it..
For Advent factions, i don't play much as the time got to fight TEC Ankylon faction, most of them are annihilated by other factions alongside using Pirates for a diversion attack..