Recommended Retainer classes

[Malzian]

Just wanted to know what a good class setup is for four retainers; two battle classes, double up on miner or one of each gatherer?

For four retainers to get the most variety of possible items, one of each gatherer and one battle class. Note that this means you will need to level all of those classes, but each gathering class can bring back a different set of minions and those minions are pure money. If you are angling more for mats off a specific type like ore and such then you can even go all miner, but that's really not optimal and you will also have to collect 5 sets of miner gear (1 for you, 1 for each of them). Ultimately it really depends on what you want to do, but if it's to maximize profits and feed your own crafting jobs, one of each is best.