Nothingness: I think the short anwer to your question is 'no'.

You can't have a time setting of 1 day and a bonus of 6 hours, because 'time setting' and 'bonus' are basically the same thing with the fischer clock. Let's look at the way the time is written, for instance 7/1/15: In this case 7 is the number of days you have in your 'savings account' when the game starts; 1 is the number of days that is added every time you make a move; and 15 is the maximum of saved time you can have. You only time out when your 'savings account' is empty, in this case that won't happen the first week no matter how slow you play.

But what you need to care most about is the middle number. If you change it to six hours, it would look like this: 7/0.6/15. That means if your opponnent moves very fast and is always online, you will have to move four times a day to keep up. If he moves at the same pace as you, you will both have to move approximately two times a day. I think that may be close to what you're looking for.