Ok so here's the build to 3 men Rotscale with. The group consists of a Necromancer and 2 Monks.
Necromancer/Mesmer.
Attributes:
16 Blood Magic
11 Domination Magic
07 Soul Reaping
1. Vampiric Gaze
2. Empathy
3. Backfire
4. Resurrection Signet
5. Arcane Echo
6. Blood Ritual
7. Awaken The Blood
8. Spoil Victor {Elite}
Monk/Mesmer.
Attributes
15 Protection Prayers
11 Healing Prayers
11 Divine Favor
1. Succor
2. Watchful Spirit
3. Essence Bond
4. Protective Spirit
5. Blessed Signet
6. Dwayna's Kiss
7. Mend Condition
8. Life Barrier {Elite}
Monk/Mesmer.
Attributes:
16 Healing Prayers
13 Divine Favor
1. Dwayna's Kiss
2. Word Of Healing {Elite}
3. Orison Of Healing
4. Rebirth
5. Healing Breeze
6. Healing Seed
7. Healing Touch
8. Essence Bond
Tips:
1. Check the Spawn of the dragon it might not be in a good position to 3 men him.
2. When you're in a good position safe under the wall, Rotscale will come down after a period of time, just move back until he resets his position and go in again.
3. Make sure you stand in a position where the arrows from the Rotting Dragons dont hit you.
4. An extra necromancer armor is required for the final blow (health around 150 or less is good enough).
5. Keep Protective Spirit on the necromancer always up.
Here's the screenshot from the first test (the warrior was used to run to Majesty's Rest but a good healing monk can do it aswell so not necessary).
http://img506.imageshack.us/my.php?image=gw086up2.jpg
Rotscale 3 Men Farming.
DarkGanni
RebelHero
a bit awkward compared to other builds imo...
Arkantos
Why do 3 man when you can do 2 man?
Ecksor
Lol true that Arkantos. Better question: Why even farm him anymore?