What was the problem bleeding them ? Thats the first issue to get over, there is nothing really abnormal about your set up Christian. Going larger up front will push more fluid but under less pressure and would be a step backwards as the backs will have more pressure until it is dialled out.

Give us another call tomorrow, missed the one tonight sorry.

AP 4 pots with something like 38/42 pistons would normally run .625 front on 5/5 or 5.5 or even greater ratio pedal box.