As well you should
Also note that unless you make a house rule there is no way to resolve more than 1 barrage coming from a single model; most play it simply using the Multiple barrages rule, but some opponents may request that you scatter each Blast from the Manticore individually(Multiple barrages is for Multiple models with a single-shot Barrage weapon each).
PS; that is an excelent Mini in your avatar, where did you get it(or is it scratch built)?