Okay, so manning that Boats at Tequatl, The Sunless, is super simple, even if you've never done this boss before. It is basically just a murderfest. You want to kill all of the mobs that spawn, and do it as fast as possible. However, due to other phases of this event, I do not recommend Berserker's (At least not FULL Berserker's) stat gear.
Your gear should depend largely on your class, the same as with every other spot on this boss, excluding the zerg which uses Soldier's gear, Cleric's, or Dire, depending on your class.
The whole idea with both North and South Boat, also known as NB and SB, is to kill everything. Literally. If it spawns, you kill it. There will be times when champion level mobs spawn, but it's nothing to fear as long as your team is well geared and knows what to do.
The simplest way that I can describe NB and SB is to think of it as a dungeon. Keep your party alive, remove conditions, and kill everything that moves.
Also, I'd like to take a moment to remind everyone that reads this that the number of people at either North or South Boat does NOT determine how many champions spawn. The spawn rate is determined by the amount of people participating in Teq as a whole, not in one specific part.