I'm no expert on this, but I'll give my 2 electrums on the subject anyway.
I use 2x modifier for single activation cost, here: Pegasus 6*1*2=12
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In this case I'd count FFs with 1x modifier in quanta generation: 6*1*1=6
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Quanta Usage: 52
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& 35
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Quanta Generation: 0,5*12+6+1= 13
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& 0,5*12=6
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Quanta Index:
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52/13=4 &
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35/6=5,83
I'd start testing with changing to 8
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Pendulum and 3
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Pillar
QG: 0,5*8+6+1=11
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& 0,5*8+3=7
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QI: 52/11=4,73 & 35/7=5
PS. I'd use Owl's Eye instead of Morning Star, because it can kill Otyugh & Maxwell.