I tried assists and didn't like them. I always felt that they were the weak link. If you aren't confident in your rig, youy never fish to 100%.
I do however like the idea of assists. I have seen plenty of fish lost through hooks bending, which is no doubt due to the leverage fish are able to exert onto the bend of the hook whilst fighting. I get round this now by rigging an owner #10 split ring to the lure, swivel off that, followed by a further split ring to the hook. There is lots of free movement at the hook, and a fish would have next to zero leverage to bend or force the hook out.
Saves on rigging wire assists, there are no weak link knots or crimps, and still all the benefits of wire.
Cheers,
SIMMO