https://www.youtube.com/watch?v=HDb-3f_CGn4
(Ignoring how one sided the match was, completely focusing on how the win was achieved and small plays made by Yuki and co. to come out so dominating on top)
Another video from Yuki, this one depicts a case of, okay so the Templar and Cleric of the other team is running Block Spec and their Gladiator is simply being Gladiator.
(In no particular order)
Geographics of the map, abusing the size of the map and corners allowing to create distance between their team and the op-for; disallowing their gladiator whom preemptively popped Beserking to close the distance to effectively use it. (Kiting)
Fairly obvious but note he pops both buffs when they're about to force an engagement, harder for them to create distance.
Keeping the enemy group clumped together as much as possible to allow greater effect of AoE's of glad and to some extent even your own.
Focusing the Gladiator seeing as the Cleric and Templar are block spec AFTER their templar has wasted group surviviability skills early on Cleric.
Abusing walls to their greatest effect disallowing their Cleric from reaching other group members and thus heal them while Glad is focusing other group members down.
Knowing when the right time is to differentiate between using RS Heal and RS Pull.
Morale Wave, seems to do little, it can help a lot particularly if your group members are clumped and few.
Knowing what buffs to poke at, Impervious Veil Cleric RS was baited in order to kill "2" (The Gladiator), Cleric couldn't react in time and 2 died as the skill ended.
A Direct correlation between a high Crit count and chances to KD are noted in throughout the video, that is why we socket additional crit, even if it seems over kill amounts.
Knowing when the right time is to BG and Pano (Primarily BG), ideally you do not BG early, it is best to be saved later on in the fight, particularly after their BG has been used.