These are my current LV8 magics right now:

Life2 / Bahamut / ----

My question is:
should I pick Flare or Meteor for the final slot?
Meteor is obviously the stronger, but isn't it just a weaker version of Bahamut?

I picked Flare the last time, since I wanted a single-hitting spell as well, but what do you think?
Is there something I should know?