Defender dillema (Mackie or Macdonald)

[Middo]

Ok unsure who to have out of these guys
my backline so far is enright, hodge, carrazzo, gram, kennelly and waters
should my last defender be mackie or macdonald or adcock or chad cornes

[Justin Bieber]

macdonald off half back. has had a good pre season and was pretty good in intra club match.

[ronl]

Mackie represents the true class, but he is of slightly more value in DT.

[antman]

mackie and adcock are the safest options