Well, thanks to recent buffing items, I managed to equip all my 300 symbs. Here's how I did it. Hope this may help others
Symbs equipped in this order:
1. Intelligent Brain Symbiant, Support Unit Aban
Used This Setup + 2x Chapman guns (+25 treatment each)
2. Intelligent Waist Symbiant, Infantry Unit Aban
Used This Setup + 2x Stamina guns (+25 each), Research Attunement Device - Health Level One, and ql 175 stamina contract, ql 242 intelligence contract. (NOTE: when we have global 3, no contracts will be necessary for any of these symbs!!)
3. Intelligent Right Arm Symbiant, Infantry Unit Aban
Everything same as the waist, just changed one sleeve to a Nova Dillon.
4. Intelligent Thigh Symbiant, Infantry Unit Aban
Used This Setup together with the above stamina guns/device/contracts.
5. Intelligent Ocular Symbiant, Infantry Unit Aban
Used This Setup (+sta guns) with ql 242 treatment contract.
6. Intelligent Left Arm Symbiant, Infantry Unit Aban
7. Intelligent Feet Symbiant, Infantry Unit Aban
8. Intelligent Right Wrist Symbiant, Infantry Unit Aban.
Used This Setup (+sta guns..) same contract as above.
Threw the 300 implants in afterwards: Final Setup