There was (is?) an exploit I don't know if they ever fixed - because after having it originally, I bought a PS4 reboot that came with two of the expansion content packs (the vampire one, and homestead building), and it STILL had the exploit in it.
It involved something like using a "fortify restoration potion" before doing a task - and the source I got it from ONLY used it for making your shout-cooldown items better, but I found it worked for crafting potions also, and the effect would then be cumulative! So you could use the potion, craft a potion of higher-that-you-could-reach power, then use THAT potion, which would boost you even more, and then craft another, etc. You had to be careful not to let the % increase get too high though, or it started working in reverse somehow. But in some cases, getting it up to 22,000% was entirely possible. Making blacksmithing gear (enchanted) and boosted blacksmithing potions was my specialty. With full super-high enchanted gear and potions in effect, you could literally increase a full blacksmithing level per iron dagger you improved. And that iron dagger would have some ridiculous damage rating, and would then sell for like 22,000. So then, if you reset your "speech" ability tree, you could level up super-fast by selling those super-expensive items also.
At one point, I had a level 500+ High Elf, who wore nothing but ragged trousers, dirty rags on his feet, cheap leather bracers on his arms (all enchanted of course). He had over 5,000 HP. I could literally jump off of mountains and survive the fall, and one-hit-kill dragons with the enchanted glass axe he carried.
That was just a mess-around game, of course, since it got boring pretty quickly being able to just defeat anything and everything with impunity.
