Re: Leveling legendaries
Your level 55 weapon will do you fine for now. Don't worry about upgrading every other level. Bank as many Moria IXP runes as you can, levelling your current LIs on mob and quest IXP. While you're levelling, keep an eye on the auction hall for a level 59/60 second age weapon that has legacies you like. They're cheap now, probably only run you a few gold. When you find one, buy it out and bank it until you can equip it. Then dump all your stored IXP runes into it.
The 2nd Age will have better DPS than any 3rd age up to level 62/63, and by then you should be looking for a level 65 Third Age with good legacies. A 59/60 2nd Age has good enough DPS to get by at level 65 until you find an acceptable replacement.
Nemesis - Brandywine
Jenith 100 Hunter || Gavigan 78 Guardian || Kazamir 76 Captain
Gjorn 65 Champion || Anavel 65 Burglar || Thissis 100 Warden || Mezimus 70 Loremaster