Sharp enough.... consider the reverse "when is my razor dull?"

The only good advice I have is to compare it with another blade.
My go-to touch stone is a BiC yellow handle tossable. Out of the
bag they are sharp enough to shave but not sharp and harsh like
a Feather blade. By holding the BiC at the far end of the handle
gently with two fingers I can feel it grab, snag and eventually snip
a whisker. With better shave prep there is less snag and more snip.

When I get my razor honed correctly for my face the grab and snag feeling
is almost gone (depends on grind) and "like butta" comes to mind but is not
quite the case.

If I keep shaving day after day... I hit my limit of tolerability in the grab snag snip
feeling and think of it as grab rip and drag... It is cost effective to wear out
a BiC and explore the dark side of dull not so on a good straight. You want to
strop a good razor lightly each day you use it to get the max life out of the edge.
If you let it get dull by not stropping you will need a touch up hone and styptic.

As for stropping --- I tend to find less is good for me
five or ten on canvas or just skip the canvas and 30-50
smooth licks on leather. The lighter and smoother I strop
the less I seem to need.

As for paste... I see no harm in 0.25 micron diamond or CBN on the canvas
side applied in small amounts over time. I do it and find it improves the
smoothness of my shave.

Paste on the leather side is less desirable. I made a bunch of strops
with nice leather from Tandy. Pasted them, oiled them all sorts of things.
I found that very light strop dressing or oil was all I needed. On one I tried Mink Oil
and found it gummy and the best thing I found to correct the draw was 0.25 micron bits
(a dusting of CeOx dust). If you spray the leather that is fine too just go lightly.

Glenn did a test using submicron spray and found it did no harm after months.
BTW: He is right... come back in a week and read the 1000's of posts.