Here is a list of people who can sponsor a visitor visa candidate:
600.232
(1) One of subclauses (2) to (4) applies.
(2) The applicant is sponsored by a settled Australian citizen, or a settled Australian permanent resident, who is at least 18 and:
(a) a relative of the applicant; or
(b) a relative of another applicant who is a member of the family unit of the applicant; or
(c) a relative of another applicant in relation to whom the applicant is a member of the family unit.
(3) The applicant is sponsored by a settled Australian citizen, or a settled Australian permanent resident, who:
(a) is a member of the Commonwealth Parliament or a State Parliament; or
(b) is a member of the Legislative Assembly of the Australian Capital Territory or the Northern Territory; or
(c) holds the office of mayor.
(4) The applicant is sponsored by a Commonwealth government agency or instrumentality or a State or Territory government agency or instrumentality.
As you can see, a Church Priest or Minister is not on the list. A Church Priest or Minister can support an application, buy not sponsor a person.