I'll admit, Ferocity + Bloodbath is a pretty decent combo, but as it stands right now, Second Wind isn't really an effective skill for Marauders to use.. atleast not during the middle of a battle.
In my opinion, Second Wind is best used at the end of a fight, to get a quick boost of HP in the event you want to attack another monster right away. The Stamina lost when using Second Wind during the middle of a fight could be better used for more offensive attacks.
Blood Bath is the same way when being used by a different class, it uses too much stamina for the modest HP gains to be truly effective in the middle of a fight. I rarely use Blood Bath on my Lancer or Gladiator, and instead use the extra stamina and time to land a few extra hits. The way I see it, the quicker the monster dies, the less damage you will take, hence, the less healing you will need.
Btw, I've tried Raging Strike + Ferocity on my Marauder and Gladiator and unfortunately I'm not seeing amazing results. At lower levels, Raging Strike or Ferocity seemingly gave about 50+ damage to the next weapon skill, but with both combined, I never noticed significant increases in comparison to just using one.