Yes, 3 minutes on a dummy is standard. 1000TP should last you 2 minutes + 500TP invigourate @~400TP for another 1 minute.

I can't say for sure, but i vaguely remember that when i looked at my numbers over 3 minutes it was around ~410, but at iLvl104.
This might not be the case for you, since i vaguely remember my accessories all being i100+, and 1str=~1dps.
For Crit percentage, to the best of my knowledge it should be around 15-20% (from what the data tells you); anything higher is an outlier.
Your burst is fine, i would assume it would burst for even higher if you used x-pots.