I mean, I have used this strat once and it worked so much better than sitting on the window.
My fireteam usually use the window one and it usually takes so many times that people leave. I try this strategy once with another one and we beat it after one wipe.
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This is actually the strategy I use when I 2 or 3 man him on normal.
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This strat is okay but it puts you too close to his enrage timer for any mess ups. Most common problem with any strat is the damn swordbearer being a bitch!