The imposing seven-year-old landed the Foxhunter Chase with ease before joining Williams from Sheila Crowe in the summer.
He said: "I think we'll give him a couple of novice chases and then he should be nicely treated for the Hennessy, but we wouldn't want to risk him on quicker ground."
Deep Purple, who won two Grade 2 races last season, is likely to step up in trip this term.
"There are so many options for him, but the Peterborough Chase at Huntingdon over two-and- a-half miles would be right up his street.
"I'm keen that he'll run over three miles this season, so the Charlie Hall Chase at Wetherby or Exeter's Haldon Gold Cup are also possible starting points," Williams added.
"We've got some nice young horses and no-one should forget about Simarian. It is not going to be easy for him as a four-year-old, but he holds his best form for Cheltenham and is a good prospect."