SpellDuration.dbc is missing row 87 making Rip's duration unresolvable client-side. All six Rip ranks (1079, 9492, 9493, 9752, 9894, 9896) carry DurationIndex = 87 in the client Spell.dbc, but the client SpellDuration.dbc has no row 87 (IDs jump 86 -> 105).
Duration=8000, DurationPerLevel=0 ...