@ Hasui
Goddess Training is the burst training with goddess spells.
There are many variants of the burst training.

About Shrink you are correct about more damage, but it is also very obviously. And the success rate for the combo is more difficult to see.
I can be mistake, but I think Shrink helped it a bit.
Because it reduced stats like -atk, -def, -matk, -mde as you wrote.
If the mob have less defense, then it would be more chance for combo, is what I though.

@ LordDaemon
You are very smart. I know about that technique already, after all I invented that at the first place and told to some friends.
Yes, the second priority is very handy for multiple mobs.
Okay, I guess I forgot to add it into my guide.

@ katatas
Yes, the speed up is a buff, but the exp from this buff will go to the caster. And the casted one must always be the attacker with low level, so casting on the pet between level 1 to 15.
Because the buff will be useless, if the casted one is too high level.

@ Others:
Thank you for your dearest words and thanks. I am happy to hear that my guide is still useful. I wonder if this guide is old-fashioned after 2 new versions.

Your regards, Hugomka