Unlocking Darth Revan

Begin dumping all resources into the Revan characters. Juhanni, BSF, carth, canderous, hk47. Bring them up to gear 12 or relic 1 or two and (this is important) have their abilities maxed at 8. You may not have to zeta them all, but I think even for future progress juhannis zeta is good, and BSF should be maxed out, Relic 3+ and all zetas

When I was working toward for DR, I went way overboard on all the characters. The only zetas needed are Bastila's and possibly HK's. Juhuni and Carth are okay, but sort of a waste. Definitely bring all characters to Gear 12, and Bastila to as high a relic as you want. The Ajunta Pall battle is the hardest one, I needed to attempted it at least 50 times.  After that it's a breeze. Good luck!

Good characters in the requirements:

• Bastilla (Fallen) - Key character in DR lineup.  - R5 now.  R7 midgame.  R8 in Endgame.
• Juhani - Key character in Starkiller lineup.  Omi for TW is awesome.  Relic now.  R9 in Endgame 

OK characters in the requirements:

• Canderous  - Will fit on a DS Mando team with Maul lead at some point  - Relic 3 is fine. Don't exceed R5.
• HK-47 - Really good in a Dr. Aphra lineup.  Don't get zetas, they are almost never on DR teams or teams using fear/deathmark!  G12 now.  Relic 5-7 when you have the rest of the Aphra Team.

Bad characters in the requirements:

• Carth.  Dude is straight up never used in endgame. Even the ship isn't really great.  G12 now.  Only Relic if you have specific needs later in end game, like a cool datacron or a TB node fill.