I think someone has led you into a misunderstanding.
First off, the HH doesn't carry torps. It carries S3 missiles which would be wasted on a large target. They're for fighters and cost too much to waste on large ships.
Secondly, the HH carries 24 S4 guns. Reports are they can all fire on the same target, and so long as that target is not dead ahead of the HH, probably there is a small fire arc where they can all bear at once, both above and below the horizon. Think for a moment what that means.
The "Alpha Strike" damage for the C-788 Ballistic Autocannon is 1461 damage. That's the very first hit of the very first projectile out of the gun. That's 36,000 damage on the very first hit, and none of that is stopped by shields. My guess is the HH can kill an 890 within 2 seconds of coming in range of its guns, and there's nothing an 890 could do to stop it. Once inside the 4k range, the 890 would just go boom.
Remember, the 890i is a luxury yacht, not a capital ship. You can confuse the issue by saying it has capital ship components, but it is not a warship. Its hull is not like that of an Idris (nor even a Polaris), and it is going to fold like an accordian if it gets into a fight with a real warship like the HH. The way the number look right now, if an HH got in range of a Polaris, the Polaris could not survive its guns. The only way for a Polaris to manage an HH is to kill it before its guns come in range.
24 guns is a LOT of guns!