The others have given excellent answers to your first question. Regarding the second, you could use the same weapon for all situations, but it would not be ideal. Although dps and healing weapons can use similar legacies and relics (the stats you need for dps and healing are pretty much identical), a tanking weapon should have different legacies and relics from other roles.
Originally Posted by psalm8818
I do not love the bright sword for its sharpness, nor the arrow for its swiftness, nor the warrior for his glory. I love only that which they defend. ~ Faramir
Undo the U12 class changes. The trait trees were, are, and will always be a bad idea.
Maedhric 100 Captain, Nunion 93 Champion, Taraviel 85 Minstrel, etc...