My math may be wrong, but shield and armor are 1.8M hitpoints each, structure is 7.2M. Late last year I have seen solo Oracles take down uncontested low power structures easily. Maybe it takes longer but it is not a big thing.
For those, who does not want to wait that long:
[Leshak, high sec bash 3000 DPS]
Entropic Radiation Sink II
Entropic Radiation Sink II
Entropic Radiation Sink II
Entropic Radiation Sink II
Damage Control II
Drone Damage Amplifier II
Drone Damage Amplifier II
Imperial Navy Drone Damage Amplifier
Caldari Navy Large Shield Extender
Gistum C-Type EM Ward Amplifier
Dread Guristas Adaptive Invulnerability Field
Large Micro Jump Drive
Supratidal Entropic Disintegrator II, Occult L
Heavy Gremlin Compact Energy Neutralizer
Heavy Gremlin Compact Energy Neutralizer
Heavy Gremlin Compact Energy Neutralizer
Heavy Gremlin Compact Energy Neutralizer
Large Ancillary Current Router II
Large Capacitor Control Circuit II
Large Capacitor Control Circuit I
My corp’s Praxis with Polarized blasters can spit out more than 2 000 DPS, so with two of them you’ll hit the damage cap of the Astrahus. Just pray for your ships that nobody come taking shots at your big ass ship.
Yea that’s kind of the important part: whether or not somebody is shooting back. An Astrahus can have pretty good defenses if it’s fit properly, so any DPS centered sub-cap could easily get wrecked. Plus, if they know you’re hitting their structures with DPS boats it wouldn’t take much to kill you ship-to-ship.
As for ship types. Oracles and Myrms are nice but you can also upship to things like blaster Megathrons, or even faction BS like Rattlesnakes or Vindicators, for a very significant DPS boost. And of course Leshaks are the ideal solution for sub-cap structure bashing because of their damage-over-time bonuses. It all just kind of depends on how much ISK you want to put on the line. A well fit Leshak can easily cost more than the structure.
If you had more people, you could also hit the damage cap of a medium citadel with like 7-10 bombers (depending on skill/fitting.) Upside of bombers is that they are cheap, mobile and not very skill demanding.
For an update, 4 Oracles arrived on grid as we had just started shooting the structure with twin Myrms. We warped away as we did not know their intentions, but tried to raise them on coms to see if they would like for us to join in. They did not respond so we watched from a distance. They made short work of the thing, maybe 10 minutes or so.
Note that the thing had just come out of structure timer when we warped in to kill it, and it was in low power mode.
I’ll check my killmails later to see if I got anything, as I contributed to some of the damage before those guys warped in. It did seem to drop a couple small ships IIRC.
High power
hp are 8640000 each, that is 7.2M base value + the 20% resistances that are on each layer of the structure.
if you reinforce a high power structure, that means you have to shoot through 8640000hp 3 times
with a 1600dps, that takes 90minutes each
total: 90minutes * 3 = 270minutes
Low Power
if you shoot at a low power structure, that means shield and armor are one sumed up hp wall, but with a reduced base value we have following values:
1.8m (shield base) + 1.8m (armor base) -> the additional 20% resistances on both each
-> 2.16M + 2.16M = 4.32M hp with 1600dps we are talking 45minutes for shield and armor and 90minutes for the structure, because again 7.2M (hullbase) + 20% -> 8640000 / 1600dps = 90minutes
total: 90minutes + 45minutes = 135minutes
most efficient/fastest ships are supercarrier/dreadnought > leshak > rattlesnake (torpedos/drones fitted) > rest
there will be drops if:
if the structure had finished ships/modules/etc in production, but the person, who started the jobs didn’t finish (aka clicking the finish) button yet
those items can drop
What @X_Mayce wrote above and also the possibility of ships dropping that @Beast_of_Revelations mentioned, plus from personal experience you also can get construction parts (and just assuming here but if the citadel had rigs still on probably have a chance to drop those or their construction materials too based on the rigs I suppose) as I’ve personally salvaged a citadel and an engineering complex wreck, the citadel dropped a loot container with construction parts (based on the astrahus blueprint what was dropped is based on the materials needed to construct it and seems unlikely that were part of a construction job, though that is just my guess and it is possible it was from a manufacturing job but I feel it being unlikely to be the case) and the other dropped nothing once the salvage finished. This was in hisec.
Full dps fitted carrrier (Nidhoggur here) (4 Fighter Support Units, 3 Drone Damage Amplifier
with T2 Firbolgs is at 3.2k dps according to Pyfa (probably slightly higher because of the F3-Key ability (don’t remember the name right now) (yes you could go 4 Drone Damage Amps too -> makes it like 3.5k dps)