Ezy123 cleared flight level 250, cross flight 350 before time35, cross flight level 320 before time 36, cross flight level 290 before time 39. ........
or
easy 123 decend flight level 250, fl 350 in 3 mins, fl320 in 4 mins, fl290 in 6mins
or
ezy123 cleared flight level 250 maintain 2500 or more
also 1 minute is a variation of 5-8 miles, it is too inaccurate as we are working down to the mile (10-15sec)