Mickleson was charged with five counts of offering to supply meth and one count of offering to supply cannabis. These were representative charges.
He was also charged with two counts of receiving stolen property, one of possessing utensils for meth, and one of possessing cannabis.
He pleaded guilty to all charges.
Defence lawyer Peter Brosnahan spoke of Mickleson's participation in a nine-week residential rehabilitative programme which placed physical restraints on him similar to being "incarcerated".
Mickleson took part in the programme in order to deal with the "scourge of meth addiction" which Mr Brosnahan said "consumed him and all but destroyed him and his family".
Mickleson told police he went into drug-dealing to support his meth addiction.
"He has eventually acknowledged it and made huge progress in terms of putting his life back together," Mr Brosnahan said.
He had a full-time job at a lunch bar.
"Society would be better served with him working."
He argued for the Crown's recommendation of 27-months imprisonment to be dropped three months so a home detention could be substituted, and said Mickleson had been under "restrictive" bail conditions.
Crown prosecutor Lance Rowe disagreed, saying the bail conditions were relaxed from time to time for Mickleson to attend events such as a rock concert in Auckland, and it was only after it was discovered he had offended while on bail that he was put onto a 24-hour curfew.
"This was bad offending, and it was highly-organised offending," Mr Rowe said.
Police found out about Mickleson's offending in 2013 while executing an operation to catch other offenders.
As Judge Cameron sentenced him to two years and three months prison time, Mickleson mouthed the words "I love you" to a woman in the gallery.