Ok i concentrate on Terrans.
Weapons: ML lvl 3 maybe lvl 4 Oguns (plasma ammo good for Bio enemys lvl 20 scuttle bugs and Ostarae) debuffed with Rada device.
ML lvl 5 Onyx ogun if u have left many ammo parts (cool launcher in my opinion)
ML lvl 4-6 Type B with chem ammo debuffed from the PW (prefered enemy mechanics like belters and drones maybe )
ML lvl 7-8 Type A same as Type B
ML Lvl 9 Zet ML (since Type A eat to much ammo) Endgame ML is your personal choice
Shields: lvl 1-3 Model x or Scales or Prototypes
lvl 4-6 Model y or Scales or Prototypes
lvl 7-9 Model Z or Scales or Prototypes
Model x/y/z for ML range buffs (no need if u take Terran reactors)
Reactors: lvl 1-4 Supergiant (ML range buff moderate cap excellent recharge) Loa line 2-4 for more cap and no ML range buff
lvl 5-6 Nova Line (ml range ... see above) Heart Line for more cap no ML range buff
lvl 7-8 Supernova Line (ml range) Shooting Star line if u can get the parts (7 easy 8 really hard)
Engines: Lvl2-4 Mercurius (sneaky for combat) ....lvl2-4 Mustangs for travel
lvl 5-6 Halley DDO (see above) ...lvl 5+6 Apaloosa for Travel
lvl 7-9 Terran Advantage (best buffs for combat stop sneaking around, become a man )..... Ursa 9 for travel
Devices: 2-4+7 Eye, Rada 3-5, (1-4 & 7-8 Roadrunner+1-4 & 7+8 Lazarus travel gear) L7 Ivory ward, L8 Intolerance
This list is not complete but might be a help while lvling up.
equip can be used for all Terran classes only point if u have a Scout use Explosive ammo since Scout's can debuff that.