How Do I pay more rake??

[RollaJ]

I just signed up at betonbet to get [censored], the interesting thing is the way they do it. It is a sliding scale, based on a high watermark..... ie. If I reach a certain amount of rake paid I will get [censored] at that highest percentage level for the next 12 months.....

$1000-4000 =30%
$4,000-7000 = 35%
$7,000 + = 40%

What is my best chance of reaching 7k+ in one months time assuming I am willing to play 4 tables? Limit or Nl, full or short, limit up to 5-10 s/h, 10-20 full, NL 2/4 or 3/6 s/h, 5/10 full