For pve or pvp?
In pvp we can make a case either way, but 7/7 is better for sustain and helps a fair bit with spell resistance.
In pve, the extra resources from Undaunted Mettle will boost your dps by a reasonable amount for going 5/1/1.
It will vary with some setups in pve too, but generally speaking, if you have a 2pc monster set you can do one in each heavy/med for Undaunted Mettle.
^^ listen to this guy.Elephant42 wrote: »You should ALWAYS wear at least one piece of each armour type while levelling. That is so that you get all armour types to 50 because you never know what the future holds. You may decide at some stage to completely rebuild your character and having all the necessary skills already levelled makes this process much less painful.