စာစီစာကုံးရေး

Mostly, yes. It refers to academic or literary essays. For a newspaper article, use 'saung-par.'

In casual conversation with young people, yes. But in any formal or educational setting, you must use 'sarsi sakone.'

'Yay' is the common verb for 'write.' 'Yay-thar' is the formal, literary version often used in writing about writing.

It is 'စာစီစာကုံးပြိုင်ပွဲ' (sarsi sakone pyaing-pwe).

'Sarsi sakone' is the noun (essay), and 'yay' is the verb (write). Together they form a collocation.

Yes, usually 'te' for a statement (yay-te) or 'nay-te' for continuous action.

Only if the blog post is very formal and structured like an essay. Otherwise, 'blog yay' is better.

The three main parts are Ni-dan (Intro), Sar-ko (Body), and Ni-gone (Conclusion).

Rarely. Business writing is usually 'sar-pay' or 'report.'

It's a metaphor from the days of palm-leaf manuscripts, comparing writing to making a flower garland.