I'm MT for the Feng encounter. I'm also the "shield" rune Tank and my problem is solely on phase 1 as all other phases are fine. I'm shielding on every other epicenter, and i'm supposed to get hit by lighting fists the other times. My Problem is 2 things:
1: I keep shield up full duration, taunt boss as he's running into raid and move so that he's facing phase 1's statue. When he casts Lighting fists (which usually his fists lands either directly in front of me or right the "F" on top of me) I don't get hit and raid has to take a full epicenter- this is like a 50/50 deal (happens half the time using this portion of the strategy)
or
2: I drop shield early taunt boss just before last tick of epicenter, as i'm about About parallel with him (if he's looking at raid- to his left) he'll casts lighting fist into center of the raid. After wards he's immediately on me and i continue to tank him while Facing phase 2's position. Then another 2 things can happen- 1: he doesn't cast Lighting fists again and raid takes an epicenter, or he does cast it again and it either misses/gets resisted or it hits and we continue as expected (again 50/50)
In the instances where he casts fists into the center of the raid, i've tried running over to where it will be to intentionally get get hit, however I never make it in time- even with using Death Advance (I'm a Death Knight btw). Also for the 2nd portion (where I tank him facing phase 2 position) the guild decided to use this strategy to combat the problem that occurs in option 1- we believed that my being so close to the fence/rail was the reasons the spell was "missing" me half the time.