Hey,
Good call on
Anger of the Gods, but I've been thinking about how flexible my mana base is and I'm not sure if it's able to get the second red mana soon enough. Also I'm not sure if it's worth bringing more board wipes oder than
Settle the Wreckage (which also exiles, but it is a turn slower).
I believe that it wouldn't be so hard casting the
terminus, having the complete set of
snapcaster mage allows me not only recasting my burn spells, but also casting
opt during my opponent's turn. But let's do some maths
First let's consider that I won't draw more than a card per turn (not ideal), that I'll hit all my land drops until the fourth turn and I won't draw
Terminus before turn 3 or 4 (trying to
simplify the mathematics).
Then, let's consider that I'll keep only hands without a
Terminus (7 cards = 60.0%, 6 cards = 65.9%, 5 cards = 69.9%), since I believe I'll be not keeping less than 5 cards at my opening hand, my total amount of hand without a
terminus is 95,9% = 1 - (1 - 0.600)*(1 - 0.659)*(1 - 0.699).
Having 4 copies of
Terminus gives me about 8,0% chance of hitting it naturaly by turn 3 or 4; having azcanta by turn 2 (28.0%) gives me a chance of 16.8% by turn 4; casting
opt during my opponent turn (52.8%) gives a chance of 16.1% of hitting it by those same turn; casting a
snapcaster mage (60.1% since I cast
opt once) targeting
opt (52.8%) during my opponent 4th turn gives me a chance of 16.8%. Adding it all together we have 24.6% chance of hitting it off the top by turn 3 or 4, while having 2
Settle the wreckage and no opts means 30.8% of the games casting settle by turn 4.
So, I believe you are right. If I didn't made any mistake mathing (hope not that many), it is more effective playing 2 mainboard settle instead of 4
terminus. Perhaps even 3
Settle the Wreckage (42.7%) would be better when expecting a meta with lots of dredge and phoenix.
Thanks for opening my mind!