Almost all cylinder combo locks are defeatable within minutes. You don't need any special tools, or even light, just start at one end and feel for the tension to ease when you click into the right combo. If you want a combo lock then I would suggest spending a little more for a more secure combo lock.
Handcuffs/shackels/leg irons can also be easily defeated if they use the standard key. The only nneeded is something small and rigid. A zip tie will work. Double locking them will only delay the theif not defeat them. If you use cuffs as your lock, use something unusual so that the causal thief will pass yours by.
I have a set of hand-made shackles with a unique key, not undefeatable but very deterable.
This winter I'm considering installing a lock on my centerstand so that in order to easily move the bike you need to unlock the centerstand. And also rig it so its locks a cable to the stand at the same time.

