Chosen Solution

Hi, I’m new to soldering, I want to learn to remove and replace 8pin chip like this (RED ARROW in photo). I brought a solder station with blower (hot air station), what is the ideal temperature (Celsius) setting for the blower and the power of the blower airflow? I tested on a testing board and I somehow blow away the micro transistor (GREEN ARROWS in photo) around the 8pin chip, this is very hard to get right! Any tips and guide how I should approach this?

Flux, 370c 70% air but it can change with each hot air station