Lasgun is nice weapon but lacks both strength and speed. This is potential damage of all human weapons:
Blaster: 9hp (damage per shot), 0.6s (charge time) = 15hp/s (damage per second)
Rifle: 5hp, 0.09s = 55.56hp/s
Painsaw: 15hp, 0.075s = 200hp/s
Shotgun: 7hp x8, 1s = 56hp/s
Lasgun: 9hp, 0.2s = 45hp/s
Mass driver: 38hp, 1s = 38hp/s
Chaingun: 6hp, 0.08s = 75hp/s
Pulse rifle: 9hp, 0.1s = 90hp/s
Flame thrower: 20hp, 0.2s = 100hp/s
Lucifer cannon (secondary): 27hp, 0.5s = 54hp/s
Lucifer cannon (primary, full charge): 265hp, 3s = 88.33hp/s