Another request:

[spoiler alert]

My strategy was to put the numbers in this pattern

  11116
  22226
  33336
  44446
  55556

It works most of the times quite well. I clear a normal column from time to time and get more space. Slowly the 6 acumulate and I get the last column. I got 200 points almost without thinking.

Perhaps if you add 7 it would be more challenging (or completely impossible).

Another posibility are willcard (that are good for any number) or crap (that must be deleted with a gren ball).