Acans are a bit tougher to frag since you're going to have to cut the flesh of the coral. You can use coral cutters (similar to wire cutters), or there's people who use a table saw if they do a lot of fragging. For the torch you can easily use the coral cutters, the skeletons aren't nearly as tough as the acan. Try to stay as far away from the head of the torch as you can. ALSO, be sure to use a coral dip after you frag them such as Seachem Reef Dip, or Two Little Fishies Revive Coral Cleaner. They disinfect the corals and form a protective slime coat to fight bacteria, fungus, and protozoans.