My 2012 with 5 speed manual i usually shift 1-2, 2-3, at 2,000rpm.
Depending on speed limit I shift to 4th at 25mph (for 25mph speed limit)
And to fifth if limit 30mph at 32mph (32 mph for 30 mph speed limit. I usually drive the speed limit but to gain fifth gear I do go 32mph... Anything over 35mph I am in fifth as fast as i can get there.)
that is as low as I can shift.
I do tend to stick to my shift at 2,000 most of the time, but occasionally let the engine run up to 3,000 like on a steep hill or such.
I have zero problems winding the engine up to 7,000rpm on a freeway ramp,
Or if I really want to 'beat' the car next to me from a stoplight.
But usually i drive easy.
When I was breaking in the car last year, i went out into the twisties and ran in third gear, never taking the car out of third, so i was running the rpms up and down constantly.. From say 2,500rpm on up to 6,000 rpm for a hour or so.
The 2012 Focus engine loves to rev and does so with zero problems.