Actually speed is very important. Besides reducing your cooldown reduction, it also makes your DoT's tick faster. At 30% speed your DoT's tick at .8 sec (a major difference late game), and that's the tick cap.
After which I'd go for crit. Putting points into damage doesn't add very much, but if you have high crit damage and %, combined with fast skills, and stacking DoT's to tick faster, you become very deadly.
As for defensive stats, try and cap both defense and evasion via points and gear. This is a difficult but possible feat.
then how much Speed should i put to get the 50 % ?
and how much Crit should i get to get the most damage out of each skill..
by the way i use a guardian and my Damage over time skills are what makes me win dungeons bosses and pvp
Question #1 : what is the Attack speed cap?
Qestion #2 : is it good to go attack speed + full def with a guardian?
Qestion #3 : at the cap level given it is level 75 how much points should I invest on my speed to get to the speed cap and get the most CDR for my skills?
Question #4 : when i reach speed cap, is it good to invest the remaining points to CRIT rather than Damage? why?
btw I am currently a level 51 Guardian and I have 44% speed -(all points invested on speed)
and i have 60% def (all points invested on Def)
if you would please answer my question I will really appreciate it thnx in advance