Always HATED the 'Skill Point Cheat' with a passion... because it's simply too damn easy...
ANY skill that requires '255 points' to "buy" the next level is actually "FREE"... and ya get 'rewarded' with another 'skill point' to boot... think all that's required is to have minimum of 2 SKP's already available !!!
Usually have all my Medics up to a level 6 or 7 BEFORE starting Vegas... may get some 'practice' on a NPC / 'recruit' a 'victim' of desert heat, when 'giving up his Canteen' for a while... using Macros sure speeds-up the process of 'healing' the wounded... especially when they're constantly reaching MORT condition. By the end of the game, most... if not all the Medics have reached level 12... once or twice, reaching level 14 (couldn't quit at 13, unlucky maybe).
Other high 'skill levels', in addition to the obvious 'Gambling' at Fat Freddy's -
Picklock - Spade's Casino... upstairs closet door & door in empty cellar; also the doors leading to the fallout shelter in the Wine Cellar. Use a Macro, they're rough to get through... can get 4, 5 maybe 6 'level-ups'... maybe enuff 'experience' for a promotion too ! (think I've gotten as high as level 12, doing this, after destroying Cochise.)
Climb - Cochise, a single character goes over the 'slippery pipes' in the first 'training room'... can boost to a level 4 (I know... the 'loose rocks in Spade's empty cellar' can do the same thing... only quicker).
Acrobat - Cochise, final level... BEFORE 'stopping the conveyor belt', ride on the moving belt (or try near the machine to be broken)...good for level 4... also couple 'exploding doorways' at Citadel that may boost skill.
Electronics can be a 'fun' skill... in addition to its 'traditional' uses, it's a quick, easy way to 'open doors' in Vegas... particularly at Spade's and the Servant's Temple. Try it on the Security Camera... but look-out for the Temple Guardians !... then 'open' the front door with a TNT !
Brawling skill IS improved ONLY with specific weapons (Club, Ax. Chainsaw, & Proton Ax !)... brawling with a crowbar, or any other 'tool' will NOT raise the skill level ! See 'stuff' available at Highpool & Nomads Trading Car to distinguish Tools & Supplies from 'weapons' ! Once a level 7 is achieved, it's okay to brawl with anything, a book, a map, a match, even a clay pot... they just don't inflict the damage of other 'weapons'.
Metallurgy skill - may be 'useful' at 2 spots in 1 location... helps characters recognize silver in rocks, then Pick Ax produces 'loot'... small amounts of cash ! "Greed" will get ya !!! 'Extra Mining', with a pick ax, WILL yield additional cash, but after 2 'extra attempts' additional adversaries are added to the 'random encounters' (a Gecko - 400 points, a Skink - 600 points, and finally a Shell Cougar - 1500 points !). Although both spots will add the adversaries, ONE of them ALSO 'unlocks' a series of 'random encounters' with almost every step the characters take. Be Forewarned !!!
Cyborg Tech - maybe you want to try the Mind Maze, but wonder if 3 SKP for the skill is worth it... at this point in the game, your Rangers and 'Recruits' should be 'pretty well developed' ! ... making it possible to 'connect to the Mind Link' and enter Finster's Mind Maze. Probably requires at least 10+ 'tries', but eventually it CAN be done !
The Helicopter - can be GREAT ! - visit & destroy Cochise by land FIRST !... AFTER its 'destruction', go back by Helicopter to 'restore it as an active location' on the main map !!! Then you can 'play with the bots' there... and pick-up any loot previously left behind. A word of caution... be sure the roof has been 'cleared' to avoid any surprises !!! The helicopter ONLY kills all the original outside bots WHEN USED for the FIRST / INITIAL visit to the base... if used later, it DOESN'T kill any of them !!!
keep 'Exploring' !