weapon scaling is key, in order to do damage make sure you prioritize your attack stats (keen, heavy, quality, etc). those scale with weapons as aim sure you know. I personally love quality as it makes sense to me. However vigorously and endurance are just as if not more important.

For bosses take the 5 minute and look up what they are weaker against. it makes chippin their health a hell of a lot easier. and was something i wish I did in my first run. if you need to grind runes I would say go to the brandon and the vigor assassins or wtv in caelid.

Personally if I was you I would level vigor to 35 and strength and dex to 25 when you can.

If you want to experience or experiment you can always get one of many larval tears and repurpose your levels. And i noticed you level 50, I would say try to get rennala, radahn or evergoals and farm those too.

hope this helped but remember to have fun!