I've noticed that your ancients are weaker than you, but what are their stats? And do they change depending on you're stats or your level?
From the description of the skill.
I believe the bonus abilities work the same way yours do.
This can be altered using runes, however.
Keep in mind that while the skills runes give you are similar in behavior to your skills, they do different amounts of damage.
Only thing I'm unsure of is how much health/armor/resistances/MF/etc each ancient has. An ancient can die, but I haven't been able to find any information on how much health they have. I assume their health/armor/resistance stats match yours unless anyone can prove otherwise or Blizzard comes out and explicitly says.