(8/7/2020) Sen Triplets doesn't allow you to play more than one land during your turn or change when you may cast spells from the target opponent's hand.
If I'm ramping, I want the most mana for my buck, so now I'm looking at Worn Powerstones and possibly even Hedron Archives, skipping the possibility of getting my Commander early in order to get more mana for bigger stuff
Sorcery speed removal with a downside of giving the creature back if removed should be powerful to see play, and in current Standard these spells are too risky and slow to justify
Other Builds There are plenty of ways to take Kenrith, the Returned King outside of the strict cEDH shell if you want to explore different directions
These fetch your way better cards but have the added flexibility of getting whatever you need for your current situation, like a board wipe to reset the board, or a Skullclamp if you need some draw
I would buy this just for the Deluge and the Swarm cards, due to massive Commander demand, and the other cards are just extra dessert