You are partially correct; Foresight and Rampart are different. You are incorrect, however, in saying Foresight is near useless. Any additional mitigation is fantastic. You pop Foresight during the times I advised and you will take such negligible damage from a boss's auto-attacks that your healer could afk for its duration and you'd still be alive. It does nothing to protect you from magic damage, but especially at lower levels most of those kinds of attacks are avoidable.