The quote you are mentioning in Acts is specifically being applied by the apostles to what was witnessed on Pentecost Sunday. So I would be careful with trying to make an application outside of that, because that isn’t necessarily consistent with Luke’s interpretation. That being said there are actually scriptural tests to determine whether prophetic visions, dreams, etc., are of God. We find these in Deuteronomy first. So if a prophet says something and it doesn’t come true, it isn’t of God. If someone says something that leads you to worship of something other than the God of Israel, it is not of God. John also tells us to test the spirits, specifically rejecting those who deny the humanity of Christ. I would suspect he would also agree with rejecting those who deny the divinity of Christ as well. I would put much more emphasis in looking to scripture as the normative means of revelation that God has provided rather than mystics. Scripture has been tested and approved as God’s inspired word. Mystics are not so reliable. Unfortunately there is a push to “prove” one’s holiness in the charismatic community through things like speaking in tongues, prophetic visions, etc., rather than allow the Holy Spirit to speak through the normative means of word and sacrament. The end result is a multiplication of false prophets. I am not dismissing the charismatic gifts, but I am urging caution.