I figured that would be true, however, recall the fight between Vin and Raskek; Rashek eventually lost his metal minds and it did take a while for the aging process to take him (making him very desprate like Vin in many instances), so the spikes issue is nullified. Secondly, in secret history, Preservation is horrified that Rashek was killed, so I don't think that the help given to Vin was intentional