From Vanguard Wiki
Mobs in Vanguard are designed to be engaged by different sized player groups. The intended encounter type is indicated by the number of dots which surround the mob's targetting icon.
[edit] Official Explanation
In general, the dots indicate the following information (although your class and character development will of course have a strong impact on your effectiveness in battle):
- One: Can be safely engaged by most adventurers fighting solo. Adventurers with strong combat skills can fight multiple one-dot enemies at a time.
- Two: Can usually be safely engaged solo. Combat specialists might be able to take on two or three at a time, with some luck and planning.
- Three: Requires planning and preparation to fight solo. Avoid multiple Threes unless fighting in a group.
- Four: Don't attempt to engage unless you're in a group.
- Five: Don't attempt to engage unless you're in a strong and well-organized group.
- Six: Only the strongest and most proficient groups should even try. Probably best to wait until you’re a higher level, or are part of a raid
[edit] Dot Colors
In addition to the number of dots a mob has, the color of the dots is also signficant. The colors may be different for each player, as they reflect a comparison between the player's level and the mob's level:
- Grey - Trivial meaning no xp
- Green - 3 levels below you gives a little xp
- Light Blue - 2 levels below you give a bit more xp
- White - Same level as you gives avg xp
- Yellow - 1 level above gives a bit more xp
- Red - 2 levels above gives quite a bit more
- Purple - 3 levels+(i think) if you can kill this you got lucky or hacked.. No idea on xp amount