Stats: Spr +25

[hiyoo]

Critical Chance only comes from Stat Point or Base Spirit or Item Bonus?

(Base Spirit) x 0.0 ?
(Base Spirit) x 0.1 ?
(Base Spirit) x 0.2 ?

(+7 Spirit Ring) x 0.0 ?
(+7 Spirit Ring) x 0.1 ?
(+7 Spirit Ring) x 0.2 ?

0.2% Critical per Spirit up until 25
0.1% Critical per Spirit after 25

Spirit - xx (+25) (25 x 0.2) = 5.0% Critical
Spirit - xx (+26) (25 x 0.2) + (1 x 0.1) = 5.1% Critical

Is it even worth put any more points into Spirit after 25?
Spirit +25 / Rest into End? Int only gives so little damage at a higher level.
Pure Spirit Build?