Yep. I tend to go by Reddit's Meta debate. SL 150 seems to feel right. I found just as many that do both. You're set either way. You do see more Havel wearers and Moonlight dubsteppers though. Well... probably not so much the latter anymore.

I fought (SPOILER)Darklurker with a melee character. It's just as easy as fighting it far away. It only has one close range attack that is easy to dodge.

My Hex Dex character just ends up being an even stat'd character by SL 150. I'm not sure how well it'll end up in PVP, which is the reason I have this character.

I'm unsure of the boss weapons being infused. I don't remember. That should be an easy check though. But stacking element buffs is so great though. Resonant Weapon is definitely the most powerful thanks to the percentage increase with max souls and the fact that people rarely have dark defense.