Well, on dojo you will always have rage points and majin buffs.
If you are a SK, u supose to be always on the middle pillar being a very good crowd control and a good killer (helping to kill key classes like turtles and plasmas).
http://dbocom.com/tools/skill-calcul...0011131443401/
With this build u can do the most popular SK combo on dojo (area stun + bold strike), the curse skill, life steal and hellzone granade helps you to kill fighters, the kaioken raise you damage to kill faster and u speed movient.
About crits: now for 1x1 the anti-critical stuffs (buffs and equipaments) are less efective than before, but on a dojo anti critical still very good, on the middle pillar (40 of 60 players is on the middle pillar on dojo) u get kames + speed needles A LOT, if u dont have any anti critical u will die very easy eventually, because that my buff is 5/5.