A few things
jump immediately to mind.
1) I'm leery of EDH decks with so few lands. You're curve isn't that high, but some of your higher CMC cards will be
dead in your hand for a while if you don't draw 1/3 of the total lands in the deck. I try to shoot for 40 lands and tweak from there. You might be trying to get some of the bigger creatures out with Yisan, but every time he dies, the counter resets, so he'll just be a quick target for removal until he gets too expensive to resummon.
2) Unless I missed something, you have zero draw. That can be iffy in EDH. Also, that makes
Reliquary Tower a little redundant, since it's only adding (1). You generally won't be using the unlimited hand size.
I had a third, but it escaped my mind when I was typing the first two. If I remember it, I'll get back to you. You might think about adding lands that have multiple purposes, like
Dryad Arbor and Sapseed
Forest. They could be useful in a pinch for other things than just mana. Also,
Llanowar Elves is another good 1 drop that has ramp, like
Elvish Mystic.