Thanks all for your replies!
really helpful else I was rather lost haha.
I just spoke to the HR officer, she said they’re looking at 3.5-3.6k range and she explained that for IRAS it’s a 15 months package, so she said based on that it’s a higher monthly quantum. Hmmm....
She said they’re submitting for approval and will email me formal offer by end of this week or early next week.