Impact or Decoy for Mini Boss Farming?

I'm making a 1h tank build. But to control aggro, I need to use several skill spam such as Binding Strike and Perfect Defense. However, I don't want to affect proration rate. Should I take impact to balance proration or decoy shot to replenish ampr quickly?
Btw, I can't take the two of them due to the lack of sp.

 

Neither, use berserk and war cry to hold Aggro and use pdef, that way you don't affect prorate at all and generate tons of aggro

 

Use a short, spammable 1mp opener>warcry>berserk>decoy>smited finale. That should be good enough to hold the aggro in most situations. Why decoy? Cuz for bosses that wanders around too much, you want to always have decoy on your side, the casting is a bit slow but its worth it

 

Decoy shot lasts quite long, 1 min. But in case you need to move around a lot(eg. Titeres, lapin, wandering wheel) decoy is a reliable way to get mp off hand. Its okay to have it re-casted often, don't feel wasteful about it

 

Berserk lvl 1 and rampage lvl 1 is enough to control aggro? Can it be used to farm multiple mini boss?

 

Yes, as the aggro is calculated from the mp cost, 500mp cost plus some aggro gears will give you nice amount of aggro per second. For berserk tho, the def/mdef reduction will lessen as the level rises. Plus you will have some extra aspd

 

Well, I think you would want to dive the forum for the info regarding how aggro works, and the types of it based on different skills
check out this one:
http://toramonline.com/index.php?th...beefy-today-chickeny-guide-to-defences.22518/