Unupped chimera costs 7
. If you used up all 6 SNs, you'll have more than enough quanta to cast it (I highly doubt 4 SoRs will absorb 6
when each SoR absorbs an average of .25
, making you have an average of 11). Even if you only cast 5SN, the chances of not being able to cast sky blitz is less than not being able to cast chimera. In all my games playing with instosis, I've used an unupped chimera because I was too lazy to up it. I never once ran out of
.