Portland hasn’t seen a Taylor Mac performance since the 2011 Time Based Arts Festival, when then arts editor Alison Hallett famously got into an in-print tiff with reviewer Noah Dunham over their conflicting interpretations of Taylor Mac’s show Comparison Is Violence, or the Ziggy Stardust Meets Tiny Tim Songbook. But the MacArthur Genius theater performer returns to this fertile valley with a bang at the end of March, performing the abridged version of A 24-Decade.