Congratulations for your performance! :smile:
That
Dryad Arbor you used on your R1's sideboarding did not seem to be on your SB, and if I did not miscount, your SB contained only 14 cards. I guess that the missing one was Dryad Arbor ...?
And how do you (and others) that play with a combination of 2x
Crop Rotation +
Bojuka Bog +
Karakas on you 75 evaluate this combination?
...
On another issue, I, too find myself in doubt of which are the "only right match ups" to sideboard
Progenitus in, so that I don't end up oversideboarding and diluting the deck.
I think that I would not bring in Progenitus in your R1 match, and that I would, instead, try to race them (only counting with the extra help from Qasali + Abrupt Decays).
But then, couldn't Progenitus stop/lock the Hem-RIP combo? If this is so, I would end up losing this potential out...
Against Burn, I guess I would bring Progenitus in, too, to have a potential "safe" way of keeping a creature threat on the battlefield, so that I don't loose to any "Piroclasm effect". (Again, I don't know if it is the "right" way of playing this match up with this list.)