There are two fundaments being aproched in this thread
Offenisve tanking reduces damage mitigation soo being able to return HP off of high damage numbers, better serve a offensive tank, wich explains why Cohier probably dosent see very many opertunities in wich combineing sw with blood bath as effective. That or hey values the enmity bonus from the added damage over the hp returns.
Blood bath works great if your dealing alot of damage as a tank, but I dont think DPS is PLD's strong suite. There is a reason the devs gave vit as a damage modifier for WAR. This way war can increase dps without decreasing damage mitigation too much. That being said, WAR is definatly far more squishier then PLD , but thats ok as they return HP from heavy crits.
Just an opinion, but WAR's strong suite seems to be cleaning up the trash adds on boss fights, they also do great as frontline dds soo long as they are not stacking enmity gear .