SW:TOR Mechanics - The Basics

[Julissa]

I am a Sith Jugg. I went into the Foundry way earlier than I should have tanking for a group of friends who all knew that I was way too low. I was fine right up until we hit the last boss. While fighting that boss I was never able to hit with anything other than the basic assault skill. Everything else was parried or resisted. But for some reason when I spammed the assult skill every so often one of the three swings assult does would do approx 50 damage. So this poses two questions:

1) Is each swing of the 3 hit assult calculated independently (seems like it is since just one number instead of three popped out)

2) Why would assult which is the ability with the 90 percent hit rate be the only ability I was able to connect with on a boss mob, when all the other special skills have the 100 hit rate. (my best guess is that the basic attack abilities have a built in "critical 20" dungeons and dragons type rule where you will hit no matter what)