I haven’t found many Operation Frostline sites. I’m not sure if they spawn less frequently than the Blood Raider Gauntlets sites, or if I have just been particularly unlucky.
For the Blood Raider sites I used a Zealot Heavy Assault Cruiser ( here ), which worked well in clearing the sites quickly and gave me an edge over Drone boats in beating them to the final killing shot / loot drop.
For this new event I put together a Legion version of my Zealot.
[Legion, Event Site]
Damage Control II
Heat Sink II
Heat Sink II
Heat Sink II
Corelum C-Type Energized Adaptive Nano Membrane
Corpum B-Type Medium Armor Repairer
10MN Afterburner II
Dark Blood Stasis Webifier
Tracking Computer II, Tracking Speed Script
Sensor Booster II, Scan Resolution Script
Focused Medium Pulse Laser II, Imperial Navy Multifrequency M
Focused Medium Pulse Laser II, Imperial Navy Multifrequency M
Focused Medium Pulse Laser II, Imperial Navy Multifrequency M
Focused Medium Pulse Laser II, Imperial Navy Multifrequency M
Focused Medium Pulse Laser II, Imperial Navy Multifrequency M
Focused Medium Pulse Laser II, Imperial Navy Multifrequency M
Medium Capacitor Control Circuit I
Medium Auxiliary Nano Pump II
Medium Energy Metastasis Adjuster II
Legion Defensive – Nanobot Injector
Legion Electronics – Tactical Targeting Network
Legion Engineering – Augmented Capacitor Reservoir
Legion Offensive – Liquid Crystal Magnifiers
Legion Propulsion – Fuel Catalyst
This provides 31.4K vs 18K EHP, 390 vs 184dps Tank, and 525 vs 415dps. The range of its guns is lower, but they track a little better. It felt like it cleared the sites from first shot to final shot in about 5 minutes, which the logs backed up.
09:48:02
09:53:00
The zealot was similar, although there were less ships to shoot. I’m not sure I need the Web, and I should change from AB to MWD. So far it is a fun little ship to use for this particular purpose.
Evehermit 
Beginning to wonder if it is the first ship that damages the BC is the one that gets the can. I alpha the cruisers and BC, and haven’t won a contested one yet…
Isn’t the Can the first in best dressed – so who ever reaches it first and loots it gets the contents?
Actually, I’m not sure. If I get the kill the can is white…. if not…
From the other comments I’d guess you’re talking highsec, since in other space we don’t really care whose can it is. 🙂
The impression I get is that the sites are being run as fast as they appear in high and low. If you want to find them then I’d recommend WH space, which means a ship that carries a probe scanner. A T3D seems to work well. You can find wormholes with a half-dozen sites to run – there was a Reddit post from a WHer of some ridiculous numbers of sites.
Of course, there is always a cloaky Proteus watching you while you run the site.
I was looking for a zergling 😦
I had to look up what a zergling was. Looks likes StarCraft’s version of head lice.