You could try the clonex, won't hurt. It's just gonna take time for that plant to recover, weeks. Go easy on the plant food. Right now it doesn't require much and any excess will burn the new sensitive root hairs. Give them shelter from the hot sun and wind, mist once in a while to keep the RH in the micro-climate high, and leave 'em them in the pot. If you want to transplant it later outdoors, then use a shovel to dig a 3" deep hole the diameter of the pot, drop the pot into that hole, fill in the gaps around the pot with dirt and they'll do better than if they had been popped out of the pot with the rootball transplanted back into native soil. The roots will find the drainholes, grow into native soil reaping the benefit of your watering and salts application.
UB