The compatibility chart on LA say puffers and lionfish are compatible. There could be conflict between an angler and puffer though. If the angler did try eating the puffer, the puffer would..well blow up and the angler hopefully would spit it out or die..
. With the angler and lion, I'd think adding the angler first would be best. Have no clue if the lion would think of the angler as food if the angler was introduced 2nd. If a 3" lion is then introduced to a tank with a 1" angler, he's not going to assume the lion is food.