I am not sure if I understand correctly the structure. I will show how I see it.
You have got 72 pages and url to each page is: domain/page_keyword1, domain/page_keyword2, ..., domain/page_keyword72.
Frontpage with its url "domain" is a static with link to different pages (link to domain/page_keyword1, domain/page_keyword2, ...) and then comes the blog part.
Do you make it like domain/blog/category1, domain/blog/category2 ..., domain/blog/category72 and then put 3 blog-posts in each category which links to its page? For instace: domain/blog/category1 {post1, post2, post3} -- links to --> domain/page_keyword1?
So do you drip blogposts everyday over a month or you post whole content (including blogposts) in just 2 days?
And why don't put normal links on frontpage to the blog page? Should it remain kind a hidden?
Not quite.
Static home page with tabs at the top to my main pages and sub pages.
My latest 10 posts show in my sidebar - I just don't put a menu link saying 'blog' in my main menu navigation...Not because I want to hide it, more because I have just never done it that way before.
However, my blog posts are domain/blog post1, domain/blog post 2, etc. I don't place categories in my permalink structure for no other reason that it makes the URL a bit too long for my liking. But, the only posts pointing to domain/page_keyword1 will be posts from that keyword category.
So, if the site is about Cars and the keyword page is 'Ford Cars', I will have a post named "The advantage of choosing a Ford as your next car" in my category called 'Ford Cars' and I will link back to the page from that blog post. I will then repeat for the next 2or 3 posts.
Very crude example but I hope you get my drift.