I think you will need 12 triggers (4 remember, 4 lay, 4 cancels). Example names lay1, lay2, lay3 etc
When conditions are met cancel lay1 using a trigger that confirms number of unmatched lay bets = 4 [6.2,6.4,6.6,6.8]
AND lay_price > r_ticks(lay1_lay_price,4) using a remember trigger for lay1
So now you cancel lay1 and resubmit using your new amount.
Experiment, I think you can achieve your goal.
'remember' and 'number of runs per selection' will be helpful
Whats the final outcome?