Filarc 56s run nice enough on a.c, check the packet of electrodes and it will tell you if suitable to run a.c, if it does t specify a.c then don't bother.
7016/8 is usually a no on low voltage AC. Buzzboxes tend to be used for 6013 and nothing much else.
6011 might work, but you'd really want to try them before buying a pack - assuming they'd be of any use of course, they're nothing like 7018's.