For most solo multi-mob flight's I just saber throw, force charge, slam, sundering assault, sweeping slash, sunder, sweep, sunder, sweep etc. 'til they all keel over. I might occasionally toss an enrage in there, and if there's a strong or better I get really fancy and toss a force choke/pommel combo.
I use a far greater range of abilities fighting a boss, but it's mostly juggling controls and interrupts.
I haven't had a place for vicious slash to even fit into the process in like 15 levels, currently 43.