Do you actually use two weapons?

Do you use two weapons and switch between them? I'm still earlyish in the game (just fought honglan for the first time) but it feels like a waste of my skill tree to try and upgrade two weapons at once?

I've been using longsword with sword counter and a one hand sword just to be able to cast more spells while roaming but wondering if should just only focus on LS and perhaps equip 2 LS to swift draw between them?

Are there weapon type combos that are your favorite?