Just bought R.P.C. on Steam and am very excited to see how it develops. I have played once on survival, made it through day 7 before all my towers were dying. I found I could not provide enough essence to keep them charged enough to kill the invading monsters.
I did use the dissolve spell, but could not keep up, mainly because I could not keep up enough influence because too many of my villagers had already died by time I discovered the dissolve spell.
Will try again.