forest spirit = 2
forest spectre = 3
forest spirit can be casted off a single nova, spectre needs at least 2
imo its not a big deal since you still need a quint which also require 2 SN to cast but maybe polder have something else in mind
anyway the pegasus seems out of place here, you'll most likely quint a scarab and a buffed forest spectre/spirit
leaving a buffed pegasus will lead to many unfavorable things (TU being the worse that could happen) and if you quint it instead, you wont be able to buff it anymore and you WILL run out of air quanta sooner or later
i'd swap pegasus for another SoG or an antimatter