I hope you find this useful. there isnt much here i know, but it should give you a start.
[color=orange]lvl 20-28 you need only 1 party of about 6. doesnt matter if they dont hit hard or have the best equipment. these low level bosses are simple to take down and require little strategy.
as with every raid boss, the strategy is to hunt the minions first, and when they are gone, u hunt the boss. for the low level raid bosses (RB's) you need a mixture of the following:
1 elven/dark elven/human knight. this person MUST have the "hate" skill
1-2 healer preferably a cleric.
3-4 damage dealers of any other type. dwarves included.
make sure all the melee fighters have soulshots, and the healers have blessed spiritshots. make sure they use them.
about level 28 your raid grp will need to get bigger. you will need the following:
2 elven/dark elven/human knight. this person MUST have the "hate" skill
1-2 healer preferably a cleric.
5-6 damage dealers of any other type. dwarves are acceptable only if they are NOT using duals. go with 3archers/2nukers or if you want to have all melee grp, get orcs and humans by the handful.