Low tier econ consulting or engineering

Hi guys, I need some advice. I have an offer for economics consulting in a low tier company T3/4, and an offer in downstream oil and gas as an engineer (Econ/MechE UGrad). I want to get into corporate/business development, not IB. Would it be better to take the consulting gig and try move up a tier or two (while changing away from the economics focus) then exit to industry? Or take the engineering job --> MBA -->? Will the engineering experience be useful or a wasteful few years? I'm not in the US, so B-school tiers and whatnot are a little less applicable.

Thanks!