Planes of Power progression
There are a number of Planes of Power progression guides and walkthroughs, some are linked here. There may be differences of course since these refer to live during the PoP timeframe (or perhaps even the current progression servers). Examples would be automatic access to specific zones once you reach certain levels or the 85/15 virtual flagging rule, or Sol Ro Tower alternate access. Those did not exist on AK and will not exist on TAKP. Alternate access quests for the zones they exist for is per character. Alt access gets you into the zone, but you still need to complete all previous flags normally to move on. You can however typically get the flags for that zone and then backtrack/fix your flags and continue on.
Planar Progression (Allakhazam)
Planar Progression (Rasper's Realm)
Planar Progression (The Spirit Realm)