Where to find Updated Guides / Resources?

I'm a returning player who hasn't played since the Lucilius boss DLC (I was never able to beat him solo) and was wondering where to find the most up-to-date guides / resources, mainly about:

• Best builds for each character (Sigils, AI builds, etc)
• Character Tier Lists (Both for playing and AI) / techs

Sorry if this information is easily locatable, but I tend to find most youtube videos to be somewhat outdated. Thank you!