Abomination will win the fight. Saw it go against a troll with 75% hp, totally owned it while abomination was down to 50's % hp. Off topic...I watch a lox tear through a troll in seconds. Snipe a troll over lox head then sit back and watch the show...Serpents are bit harder since you have to drag them to shore and usually pull land monsters to you from the fighting.

The worst part is the serpents spawning far from land. Would be nice if part of body and head hang over the ship, so when you kill it, you get the loot and lost it all.