You can cast Ring of Frost and cancel the cast, but the visual will remain for a few seconds! Here's a macro I use:
INFINITE RANGE
/cast Ring of Frost
/stopcasting
/cast Ring of Frost
/stopcasting
/cast Ring of Frost
/stopcasting
/cast Ring of Frost
/stopcasting
/cast Ring of Frost
/stopcasting
/cast Ring of Frost
/stopcasting
/cast Ring of Frost
/stopcasting
/cast Ring of Frost
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