Why?
Mizar Sniper Blaster (Attack Droid, Orbital Strike and Attack Charge aswell) was an event blueprint and very special for a few years, since it was usually only available in Sol System. With decryption changes it was decided to change it from event blueprint to a rare blueprints collectable for everyone. It got the extra special treatment and therefore some unit had to be chosen to drop the blueprint. Same for the Defender class rare blueprints, they were also added to be collectable and had to be distributed somewhere.
it is a very limited blueprint considering you only get it from exactly Level 39 Paralysors.
They drop 2 rare blueprints, Stundome and Sniper Blaster.
There are only 4 or 5 units in this one and only spawn point with ~ 2 minute respawn time.
If you really hunt there for 2 weeks that is just an absurd amount of time even without a blueprint tracker boost.
That's why I think you might have lowered the droprate with a ship that is too high leveled for this bp hunt.
If you hunt with Earth, Draco or even Sirius tech the droprate just drops too much.
Maybe you shoot every unit that you see including death squads out of boredom at this spawn point, that decreases your chances aswell in my experience.
Only shoot the Paralysors.
I recommend you to use Molikar Tech Level or maximum Mars Tech Level.
Like this it would take depending on your bp blueprint tracker boost 2-4,5h playtime.