What do you mean by "2nd option for legendary power"? A new legendary item? If so, I wouldn't spend TP on those, you can find 3rd age legendaries in loot drops in all areas starting from Moria. If you want a 2nd age or 1st age item, you can ask a weaponsmith, woodworker or jeweller to make you one (he'll have to be high ranked in the crafting guild and you might need to spend some gold on special materials for higher lvl items).
If you're only lvl 45, I wouldn't get any new LI yet. Get used to the system with the item you get from the epic questline, and change your LI every 5 levels or so (note that crafted items can only be made for lvls 50, 55, 60, 65, 75 and 85).
Fordil of Landroval, Minstrel officer of The Alliance
Check out my Guide for New Players: https://www.lotro.com/forums/showthread.php?507561-GUIDE-New-to-LOTRO-hints-and-tips