My Warden is entering the mid-40s and exiting “one level per day” unless I take some vacation time. The real goal is level 58, when a daily Barrow Downs Survival skirmish becomes more plausible with Conviction (AE heal and threat: kite-tanking).
Just ahead lies what used to be the endgame, so there is a ridiculous lot of content available: Angmar, Goblin Town, Eregion, and Forochel, plus all the Shadows of Angmar™-era endgame instances and occupations, plus skirmishes and scaling content. The leveling path becomes far more constrained in Moria, but I could enter there in my mid-50s, or you can skip any level range in these days of scaling content.
I already have my completist character with a mostly complete deed log, so I have only a minimal urge to achievement-grind on this character. I have accepted advice on the five virtues she needs, so that will be ~50 deeds, and the rest is decoration that no one else can see. The “Warden” title is not available until level 65, so I may pick another target deed before then. I do feel compelled to complete the deeds for X quests in each zone plus the epic chain, but The Shire is my only place to backtrack and quest-grind. I may even overcome the compulsion to complete the mail and pie delivery chains.