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< For both arcane shield and prot pots
Both Arcane Shield and Prot pots count as "protection" (shields that block physical damage) and they do nothing to prevent any type of crowd control that comes from other skills (Forceful shot, Achilles; and Rupture's mag damage will just go through). So the answer to your question is NO, "shields" don't help in dealing with these skills and can only block the physical damage instance that is necessary to apply them (dagger hit from Rogue, Frany hit from Barb, arrow hit from Ranger).