What pedals do you use on Bass VI?

I'm a guitarist and bassist and looking to buy a Bass VI. I mostly use a Rat distortion which sounds great on both bass and guitar so I'd assume it works on bass VI as well, but what about modulation or compression? Phasers and Flangers designed for guitar often sound very thin or out of tune on bass. Is compression as necessary on bass VI as it is on a standard bass? Should I generally look for pedals designed for bass or for guitar?

What are your go-to pedals on bass VI?