What are the max. attribute requirements of gems?

Hi, after I read about the recently released vendor recipe to increase a gems quality to 20%, I decided to level as many gems to level 20 as I can, while farming items/currency.

I quickly ran into a couple of problems, mainly:

1) If I ever want to change my gear (which has stats on it), I won't be able to use my gems anymore

2) Some skills and auras will increase their costs so much, that I won't be able to sustain them if I level them past a certain point

The problem is, I can't think of any way to prevent (2) from happening without inevitably causing (1).

So my question is, how much raw stats do I need, in order to use every level 20 skill/support gem there is in the game?

Thank you very much, if you can answer this! :)

Hi, I suggest checking the wiki:
http://pathofexile.gamepedia.com/Quest_Rewards

It seems like the max is 151 int, dex or str for pure active skill gems.

Thanks for the link. I used it to look up the requirements for the other gems:

Single attribute skills: 151
Single attribute support: 109
Multiple attribute skills: : 95 and 66
Multiple attribute support: 68 and 47

At this point that means I can level everything to 20 except pure Dex and pure Str skills. So it's either Astramentis or back to twinking. hmm.

Atziri's Foible could help you aswell. Check it

Haste is 153 dex @ level 20.