The reason not to get 250 weapon schematics is that if you do that then the majority of your weapons will likely be G5 armoury queens.
I suspect that you will settle on a mix of weapons for most circumstances. For example:
Maverick - Executioner (Intimidator as a second choice) with a sidearm, say a Tormentor.
Dominator - Aphelion and Intimidator with the Tormentor.
That's only 4 weapons. What to upgrade and mod will depend on how you play the game and your perceived needs. The above is only to give you an idea as to how your decisions affect your need for weapon schematics.
Steve 07.
My G5 weapons are the Executioner and Tormentor and a G3 Intimidator, which I may or may not upgrade. those are the three I use.