authority site

If I wanted to do an authority site, should I do something custom or should I use wordpress? I can do pretty much anything, just wondering what you have had experience with. Thanks!

I have an authority site i want to start a blog for, but i'm unsure whether to go for a subdomain (blog.mysitedotcom) or a completely new domain name specifically for the blog. I expect that because subdomains are considered completely separate sites from the main domain, it wont get any extra...