There isn't something like "the armour set we should be striving for". The question is, what do you need, what is your playstyle?
- Wanna do acceptable damage on landscape? You'll need every bit of Crit and Physical Mastery you can achieve, and Finesse too.
- Wanna tank an instance or even a raid? You need the armour with the highest vitality, and preferably Tactical Mitigation. The other tanking stats (block/parry/evade, crit defence, resistance) are less important.
- Wanna try healing? You'll need Crit and Outgoing Healing. (Although blue cappy is in a bad spot atm.)
- Wanna fill out the Red Cappy support role in an instance / raid? People tend to mix damage, tank, and healing pieces here.
Dont't look at the name of the armour pieces. Look at the stats.