What I have seen done in the past(what I have done) is duo with a pet class. Have pet class bind at zone line, send pet to aggro horses, gate then zone. After the pet dies, paladin can swim down and find the scroll.
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Grelwin, Grelroc, Grelfu, Greltwin
60 Halfling Druid
57 Iksar Shadowknight
60 Iksar Monk
20 Halfling Druid
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