I suspect the first would result in "Terrible Fearlessness" ala the old RM2 BGO. Perhaps worse.
"A thousand Orcs? I charge!" only works if you're Groo, sometimes fear is good.
Hmm, creative?
Take an acorn, walk up to the castle wall, stick acorn in crevice, cast the higher level plant growth on it to get a "Fully mature" Oak Tree. . .watch as the questing roots and weight of wood tear a nice breach in the wall.
A recent suggestion from another thread: Purchase a giant steak or any other dense food material, use shrink. . .feed to foes. . .cancel spell duration. . .they should be at least discomforted, likely injured, perhaps killed.