I do not understand your new logic!
You still need to get the crank pulley off.
You should get it off BEFORE you take the head off, to eliminate the risk of dislodging the liners. Especially as you do not have a crank locking tool!
Cutting the belt will not gain anything (except a small amount of time), as you still need to get a new belt on.
You still need to remove the engine mount (or at least undue one end), to get the new belt in
If you jumped teeth trying to undo the crank pulley (while locking the camshafts with the tool), then,
unless you slackened the tensioner first, you have either a very worn belt (virtually no teeth), or a bigger problem. Correctly tensioned a belt in good condition will take an immense amount of force, and would likely snap before jumping, or stripping teeth.
The aluminium cam locking tool would have also have gotten chewed up before the belt slipped a tooth! (I know because I tried it that way before getting a crank locking tool).
You would replace the belt regardless of its condition anyway.
Why are you worried about the timing of the engine now when you are about to remove the timing belt? With the head locked in the correct position, the valves are in a "safe" position, and I believe impossible for pistons to hit them (though not tried!) You would at least need to turn the crank 90 deg. before they came anywhere close, so a few teeth will make no difference (with the locking tool in place!!!!)
Do not turn the crank with the head off!