5 dmg is better. 5 dmg adds 5% dmg. 5 crit adds about 1.25% dmg. That's why. Skills like AS make 5 crit better, but I do not think it overtakes 5 dmg under any circuimstance.
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My build:
Aimed max
Nox Max
Trap - no explosion
Razor -3/5 duration+dodge
Peirce - 3/5 heal+3 target
Passive - int dex str
i think i wont change this build until new expansion