Dark Vines with Jotunheim? Hmmm... That might be the only combination I haven't tried yet so I readily confess that I might have missjudged Dark Vines. They just didn't seem on par with other available bloodsummons.
I sort of assumed that my suggestions were unfeasible. I simply couldn't come up with appropriate spelleffects so I tried to obfuscate my answer with wishful thinking. Hopefully with time more options will open up for inspired modders.
