The Blockade, level 4

Faction: Blood Raiders
Mission type: Encounter
Space type: Unknown
Damage dealt: EM/Therm
Recommended damage dealing: EM/Therm
Extras: NOS (Harbinger/Priest/Dark Priest/Arch Templars)
Recommended ships: Dominix, Rokh, Megathron Navy Issue

You warp right into the mission at a random spot. The respawns might be random. It's allways the battleship that is 1x of that triggers the next spawn. If all battleships are similar, the respawn trigger is random.

Initial:

5x Battleships
5x Destroyers
1x Stasis tower

1st wave:

5x Battleships
8x Heavy Assault Cruisers
2x frigates,
2x Interceptors (Web/scramble)

2nd wave:

7x Battleships
3x Interceptors (Web/scramble)
1x Frigate

3rd wave:

4x Battleships
4x Battlecruisers
3x Heavy Assault Cruisers (nos)
3x Interceptors (Web/scramble)

4th wave:

4x Battleships
4x Interceptors (Web/scramble)

Mission completes when Corpus pope is destroyed. (Final wave).

You get notified each time a new spawn arrives, and when you have killed the leader.