Starting a new character in DAoC has never been easier with all these new expansions. It is much easier to level a pet friendly class with a heal over time bot than to level any other character. For midgard you would use a spiritmaster specced into summoning, for hibernia you can use an enchanter and for albion a necromancer. These pets are able to take down much more mobs than the average toon. With a heal over time bot or a buff bot they can take down 5-10 mobs at once. Keep in mind it is much faster if you rented a power level bot and a buff bot then level your main rvr toons after.
With a stuffed summoning pet you can take down 5-10 yellow con buff mobs with a few heals or heal overtime. If you're pet is master level 9 you can take down even more. I have done about 30-40 yellow con mobs with a heal over time. The ideal place is level at is passage of conflict or task dungeons. I prefer Passage of conflict because of the respec stones that drops along with decent rog loot. Passage of conflict also gives out much higher experience points than the average zones and task dungeons.
You can make about 10 plat leveling a new character from 1-50. If respec stones drop, you can probably sell them for 1 to 2 extra plats. I usually get about 5 from leveling a character 1 to 50. I normally stop power leveling at level 47 in which you are then able to get the level level to 48. After getting to level 48 I prefer to quest for the rest of the experience . From 48 you can do the necklace quest in which you should be able to get 48 and a half. After hitting 48.5 you can do the commander quests in your capital cities. That should be able to get you to 49.5 and it only takes about 1 hour to complete them all.
From 49.5 I would start joining raids for master levels or artifact credits. You can even start rvring as well. Getting to 50 should be easy considering you have so many other stuff that you can do. Personally I would just go out to rvr, collect bounty points and buy whatever credit I need, which are usually master level credits & artifact credits. Keep in mind, it takes about 60 hours of play time to get to 50, but for a pet summoning class it would take maybe 24 hours. Having an additional class such as a summoning class can help with farming plat and items. Good luck and enjoy.