I used the 212 and it started up and finished as expected - even in my ~65F basement without the brew belt. Tastes very good as of racking this morning and i just put the kit on 2 sprials of heavy french and one spiral of heavy american oak this morning.
I think the general recommendation is to use 212 not 1118. Then if your fermentation gets stuck for whatever reason you then have the 1118 to jump start it.
But i aslo feel like they are Purposfully ambiguous in their directions and with the ingredients in order to encourage some level of experimentation and discovery.