Pure speculation based on previous tiers of attachments.
Strobe II ( gonna assume +10/15/20/25 enmity, Uses provoke every 30s)
Tension Spring III: 3/6/9/12 ->6/9/12/15-> 9/12/15/18%
Loudspeaker III: 5/10/15/20 -> 10/15/20/25-> 15/20/25/30
Tranquilizer II: 30/40/50/60 (hopeful it would be 30/60/90/120)
Accelerator III: 5/10/15/20 -> 10/15/20/25-> 15/20/25/30
Scope II: 20/30/40/50 (hopeful it would be 20/40/60/80)
Shock Absorber III: (assuming this is a typo and means II), stronger stoneskin, every 2 minutes (instead of 3)
Armor Plate III: 5/7.5/10/15 -> 10/15/20/25 -> 15/20/25/30
Stabilizer III: 5/10/15/20 -> 10/15/20/25-> 15/20/25/30
Coiler II: 3/10/20/30 -> 10/20/30/40
Mana Jammer III: 10/20/30/40 -> 20/30/40/50 -> 30/40/50/60
Stealth Screen II : -10/20/30/40 -> -20/30/40/50
Auto-Repair Kit III: hp + 6.3->12.5 ->18% , VE regen at 3 x light 13->39->65
Mana Tank III: Mp + 4 -> 8 -> 12%, Refresh 0/2/4/7 -> 0/4/7/9 -> 0/7/9/11
General thoughts:
Acc/eva/mag acc/mab all seem to be rather meh if they keep the same upgrade pattern as they are not % based.
Clear winners:
Tension spring 3
Armor plate 3
Coiler 2
Mana jamer
auto repair 3
mana tank 3
Why? they are all % based and scale better with levels