On yet another axis, youre sacking a lot of creatures anyway so maybe you want something like Whisper, Blood Liturgist
The 6 +1+1 counters from the 2 dying Reyhans are seen and replaced by all 3 Reyhans for 18x +1+1 counters on the original 3/3 for a perfect 21 commander damage
It doesn't copy whether that permanent is tapped or untapped, whether that permanent has any counters on it or any Auras and/or Equipment attached to it, and it doesn't copy any non-copy effects that have changed that permanent's power, toughness, types, color, abilities, or so on
Though his name is not on the card, he still takes center stage in this illustration, with Stitch holding Lilo as they are both outlined in the Emerald ink in a truly inspired drawing
Lastly, despite all this power, Sol Ring is both affordable and easy to find