Right, i am finally considering splashing 2 mnk for evasion. Being able to run around essentially anywhere seems pretty lulzy. however i am concerned about the effects on my dc/ spell pen

I lose-
2 spell pen
2 int
1 feat net. (translates to one less DC on ench.)
some sp (both from capstone and not taking the levels)

I gain-
evasion
1 more toughness.

now, i am wondering whether a more or less max DC wizard (at lv 18 atm, 43 necro 43 ench) really cares about the loss of the DCs at endgame (like the new epic stuff)
(i have 2 wiz past life) Also, how perfect should spell pen be? will losing 2 spell pen put me below the "they only save on a 20" range?

my first priority is to be as effective as possible with CC/Necro (and dying is very rare when capped, the evasion is essentially just icing), but if my stats make that the extra few points irrelevant, evasion seems pretty sexy :]