Hangar help! Android silver

So currently i have this 6/6 hangar for Android Silver 2:
-RDB Griff
-PDB Griff
-Thunder/Orkan Boa
-Thunder/pinata Leo

I have 1k au and am very close to receive Aphid from the event. I have 2 options in mind:

A) Change the the PDB Griff to Aphid/Taran Griff, and turn the Thunder/Pinata Leo into a Thunder/Magnum Leo
B) Save up some more to buy Orkan and turn the Thunder/Orkan Boa into a DB Griff

Please help me decide which will improve my hangar the most. Thank you

P.S. Im not interested in grinding for the 5th slot atm.