I've copied and pasted it for you. Not the exact answer I was after but like you said everyone is different. All I really wanted to know was the difference between multiwave and extended bolus but I asked in completely the wrong way! Anyway here's the post:
There are three types of boluses: standard, extended and multiwave. The last one is a combination of standard and extended. You bolus some insulin at the time of eating (standard bolus) and then extend the rest. For meal without carbs you would use only extended as you don't need any insulin at the time of eating. Hope that helps