Q:
Good way to LVL around 45
Ascalonian Catacombs is relatively easy, bring some level 80 friends and it’ll be trivial. You can run your character to Fireheart Rise, do Citadel of Flames path 1 (in like 5-8 minutes) and switch to your low level character at the end. CM/TA are more of a pain than they’re worth for levelling, I wouldn’t recommend those.
Also consider crafting, http://www.gw2crafts.net/ has guides for the cheapest ways to do each profession, and it updates frequently via the trading post to stay current. At the time of this posting, cooking only costs like 1.6 gold.
Of course just doing map completion will help as well, hearts and whatnot give good experience.
Genesis Theory [GT] (HoD)
Southsun Cove this month, by the end of the month or week you should be closing in on 80, just get yourself in a zerg and go to town on Instigators, karka swarms, and other events.
At level 45, AC and CM can possibly be more trouble than they’re worth for leveling if you’re not lucky enough to have a group of decently skilled higher leveled friends. PUGs are hit or miss but are likely to expect you to be level 80.
If your server has an active WvW community while you are online, hook up with a zerg and follow the event train there -events give very good experience.
If not, going to Southsun, as Lil Puppy suggests, and joining a zerg there could get you good experience – you’ll have better luck getting hits in on stuff and also get a decent number of events.
I tend to stick to PvE map exploration for leveling. At level 45, consider exploring Harathi Hinterlands, the southern portion of Lornar’s Pass, Bloodtide Coast, or Blazeridge Steppes. If you don’t care about map completion, ignore the hearts – just do Dynamic Events as you come across them (and you can just do a bit and then move on – you’ll still get credit). I also use food to help increase the exp gained from kills.
And always, always, do your PvE dailies and monthlies. Each objective completed gives you some decent exp.
(edited by DEKeyzToChaos.7381)