BloodyAx said:
Yah, thats what I though, but some people thought that its only "fair" if I make opponents who have pc class levels into gestalts.
It's up to you, the DM, to design if you want to gestalt villians. A rough guide we go by is if your PC is 25-points, a villian built with 28-point is about 1 CR higher than normal. And each 2 points is another CR. Gestalt makes a NPC about 2 CR higher because of BAB, saves, HP, etc.
Keep in mind that while the core rules have the class level = CR, that is not a good guide once you get use to how challenge ratings work.
An orge is 4d8+11 HD with a +8 to hit for 2d8+7 damage and is only CR 3. A level 3 monk is not even close to that CR. I'd make a level 3 monk CR 2. A level 20 fighter is not going to use up 20% of a 20th-level party's resources. However, a 20th-level sorcerer is much more challenging.
Anyway, I digress. It is up to you to decided on gestalt or not for villians. In the gestalt campaign I ran I did not make every NPC gestalt. I did make some villians gestalt because it makes a villian a good match with more options; one was an evil druid/cleric with a dire tiger companion. Pretty cool stuff.
For a one PC campaign I'd suggest starting above 1st level. Probably around level 6 or so. Start with low CR encounters to get use to what the PC can handle. I'd recommend that if you are using fighter combine it with bard, cleric, druid, monk, ranger, or paladin. They all get some form of healing. Barbarian might be a better option than fighter when combined with gestalt because of uncanny dodge, DR, and rage. Combining barbarian/monk gives insane movement to run away (handy solo) and he can rest at your option to recover X/day abilities.
Much depends on the style of the campaign; urban, dungeon, wilderness? Hack and slash or lots of role-playing intrigue?