This boss will fight with nearby groups of Outcasts soon after you enter the radar.
This boss has no healing skills, making it an easy target.
Although Reefclaw is near a group of his allies he is not part of it and can be aggroed without alarming the group.
If you do not pull him VERY far away, and if you do not kill him quickly enough, a bunch of Outcasts WILL aggro him and, subsequently, you. You have about 1 minute to kill him before they come in, but they come in running fast and your chance is over by then.
Luxon Chests are around the area, so consider bringing some keys along.
See Also
N/Me Midnight Solo build for solo farming Reefclaw Ragebound
W/N Sskai's Sword Farmer build for solo farming Reefclaw Ragebound