Epics from easiest to hardest

[Daldaen]

Going easier top, go harder bottom:

Rogue
Shaman
Monk
Cleric
Paladin
Enchanter
---------
Ranger
Druid
Warrior
Shadowknight
Bard
Wizard
Magician
Necromancer

I put a split after Enchanter epic because all epics after that point require you kill an FTE rotated raid mob. Meaning you have to be in a guild to get the kills for these. The paladin one requires it, but Paladins can buy the book and not many Paladins exist so it isn't too bad.

Rogue, Shaman and Monk epics are extremely easy. Join a guild, get into your 50s on those characters and do the steps that don't require your guilds assistance:

Rogue - Pickpocket pages, turn into Stanos/Eldreth, grab Hate book during a Hate raid. Hire a Druid to help you kill Renux. Then you're ready for the final fight with General, which requires your guild's help. If you don't get a Quill drop, then look into buying the Robes.

Shaman - Repeat CoM pages over and over to max faction. Attend a Fear raid and get a Child's Tear. Then ask guild to help you do final fight in CoM

Monk - Get a few friends together (Cleric, Druid, Monk, Tank, Melee DPS X2). Do the Eejag fight, get a wizard to port you up to Sky for the Presence fight (bring 3,000 plat to pay for people's Key of Swords). Then do the Trunt fight after this. Gather another group from your guild and do Xenovorash fight.

If you haven't exhausted too many favors, call in friends to kill Brother Q/Z for Robe. If you have, do the camps for Raster/Targin and quest your robe. Level in KC at hands and hope to win roll on 1 pipe. Buy the Chardok pipe or create a group and kill in the Levitate tunnel for a few hours. Then do a named farming group in Skyfire, best to do this with an Enchanter needing Felia or camp Eldrig with a bard.

If you have a dedicated group of friends/guild mates, most of these steps can be done over a single weekend.

Necromancer epic you won't get unless you raid a ton or buy the pieces for 500k~. I'd suggest against buying your Rogue's epic on your main. It's easy enough to quest yourself as I mention above. Attend a Hate raid, Ask 1 Druid to help you kill Renux and be in a guild and get help to kill General.