The 1907 LDS vest-pocket edition accidentally replaced the gerundive ministering with the nongerundive ministry, perhaps because this final conjunct was joined with a preceding nongerundive noun, power. The Book of Mormon text otherwise has only “the ministering of angels” (two times, in Omni 1:25 and Moroni 7:25), never “the ministry of angels”.
Summary: Maintain the original expression “the ministering of angels” in Jacob 7:17.