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No matter how many players you encounter in World PvP, PredatorFrames will fit them all. These are example frames I generated, but it has no limit to how many players it will track. The frames, however, may narrow quite a bit.
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The addon will show flags, debuff stacks, diminishing returns, how many players are targeting each player, and the raid leader's target.
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This is the addon picking up player frames from an attack on Lions Watch.
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Picture of the addon in a battleground.
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PredatorFrames also shows Orb possession in ToK.