Actually u can just run and kill last rb (tested)
But , you wont be able to enchant your weapon !
stronger weapon easy'er battle plus pet gets stronger,and ure getting nukes !
What weapon, what pet? You dont need to ench weapon or use pet at all.
1st step: Just run on last rb (ofc you need to kill mobs on the road).
2nd step: Pull him on the ship (dont att him on river)
3rd step: Att him, he will nuke you once or twice but use palaika QHP or QHP which u can buy on RPG person.
4th step: On 50% hp he will tp but since you pulled him on the ship healers wont spam and rb wont att anymore.
5th step: Speak with npc and take your reward.