in case you didn't know, Morrigan can cancel any of her specials into fly (qcb+s). this makes her ground fireballs safer, and in addition to that, you can cancel her aerial shadow blade, which is great because shadow blade builds meter really nicely.
you can add extra hits into your combos with something like:
c.L > c.M > s.H > c.H > S > j.M > j.M > j.H > shadow blade > qcb S (fly cancel) > j.H > j.S (cancels fly) > land > S > continue with w.e
you could even do multiple reps if you wanted to, but bigtime damage scaling will kick in.