The flaw could be, like Mike said, you haven't upgraded your taunt by buying the right grimoire.
Are you shadowbolting in fights? That will pull agro.
Read the compendium on how to "drain hunt." In a nutshell, it's the art of helping your vw keep agro while you tap and drain and end fights full of mana and health (so you have no downtime, thus keeping a good exp-gain-per-hour-played rate).
You sic vw while casting cor and coa (and the aff dot if you have it). Do NOT cast immolate until two taunts have landed unresisted (learn to spot this). Then try immolate (which is not needed if you're fighting greens or low yellows). Tap to refill mana, drain to rebuild health. Wand if needed.
OR read the compendium and learn how to "drain TANK."
To kill three mobs w/ a vw: let the vw hit FIRST. If you cast before he hits one of the mobs (you're attacking a cluster of three), the other two will attack YOU. If vw hits first, all 3 will be on him.
Dot up first mob. Once he's got all the dots you think are needed on him, move vw to second mob and dot twice.
First mob will charge you. This is okay, he'll be around half dead or more. Shadowbolt him, searing pain him, fear him if it's safe tossing on another dot - whatever - kill him. It's not hard.
Add another dot to second mob and move vw to third mob, dotting it. Second mob will charge you. Kill it like you killed the first one.
Now tap self and drain third mob to repair your health. Heal vw if needed, but ususally this is not needed (with health funnel). Or fear third mob if vw's going down (or sac vw and finish off third mob - usually only needed if the mobs are very tough).
Have the vw use his ability to heal himself while you loot; move to next fight. Simple.
Edit, I've found you can't sic the vw and then area attack. It will pull agro, even if you use the vw's area taunt. Btw, his area taunt is a nice "safety valve" - just keep in mind the range is not huge (i.e. if you get attacked, run close to vw and hit the area taunt button -- do NOT leave this one on autocast).
Edited, Nov 15th 2007 3:53pm by IponemaGirl