The ultimate DPS on a raid is based on who you're grouped with or buffed by, not whether you're STR-AGI or STR-WIS. Your weapon is obviously a factor, but the presence of dirges, illusionists etc is far more important than your AA spec. That aside, to me STR-WIS and STR-AGI are too close to call for comparable weapons.
With cheaper respecs now (cost reset to 10g each 30 days) you can experiment easily enough
