Best strings for shoegaze, postrock/postmetal

For years now, I've been using 10s when playing, pretty much since I started playing electric guitar. And I play a good bit in DADGAD, drop D and drop C. Now, because they're tuned down from the standard tuning, I was led to believe that 'stronger' gauge strings are better, but the really thicker gauges are for even lower tunings?

I'll add that I don't really play lead guitar, mostly chords and...I think they're called voicings? Kind of like power chords but with add9s, or sus'es, or open strings etc....I'm sure you understand what I' trying to say. When I do venture up the neck, it's really just harmonizing, so no flashy stuff going on with me, the lead guitarist can handle all that.

Anyway, should I go for heavier gauges? Or are 10s good enough...I mean, better the devil you know, eh?