I recently made a Blaster with Wild Fortress as well, I'd enjoy either/or option, just would love to have that vine effect always available. Whether it's treated as an "Aura" slot that everyone can see, or if it lasts so long as Wild Fortress the power is toggled on.
I tried this when I first made the character! And it wasn't permanent, so I tried the other options, and all of them have the vines fade out for some reason. :c Going to give this one more try in a bit.