Going back to the first poster, I agree that drain spells are somewhat useless.
My experience is that the links break too quickly and thus you lost a lot of sap/hp for casting a spell that doesn't do a lot of initial damage.
I would like to see
a. more initial damage
or
b. higher success rate in keeping links alive
or
c. damage increases over time so that at least it makes you keep trying
or
d. adjustment to amplifiers as mentioned
My experience is that the links break too quickly and thus you lost a lot of sap/hp for casting a spell that doesn't do a lot of initial damage.
I would like to see
a. more initial damage
or
b. higher success rate in keeping links alive
or
c. damage increases over time so that at least it makes you keep trying
or
d. adjustment to amplifiers as mentioned