But not everyone uses the PC version. Some people are just too poor to even pay for the computer to run the game.
That reminds me of a Dilbert comic strip. The boss asks to be shown again how to reboot his laptop. He's told to raise it above his head and shake it.

you can learn alot from lydia
I've examined her at length (and breadth!) and I can assure you that she possesses no tattoos.

Otherwise, I haven't tried a mage-type of follower. I can give Lydia a couple of staves and she'll rip 'em a new one every time. I did take Jenassa out for some work west of Whiterun. I can't add any more than what was said here already. She's pretty darn good. Somehow she gives off a "professional" vibe.
Mjoll is the Chatty Cathy of followers, it's true, and though she can't die, she was getting one-shot by a Forsworn archer at level 48! I examined her stats and found that damage resistance was something like -20000. Good grief. I set it to 300 or so, and she can keep up a steady stream of taunts now, lol.
"Think you can take me?! Ha! I love a good fight! The White take you!"