Alright, so I've had some time to look into these MCDs posts on
AJATT to see what they are all about. It seems each MCD is meant to focus on a single kanji, rather than a whole word. This makes a lot of sense, but also can (and likely will) mean that you can have multiple cards for the same sentence.
However, it also seems that this might be better once you have more kanji/readings under your belt, since they are so context dependent.
To that end, I'm going to use a combination of both going forward. I'm going to continue adding sentences to my original deck primarily, until I can go monolingual. From there, I think it would be best to ease into MCDs a little at a time until I've got a solid enough grasp on things to use them effectively.
To clarify a bit further, here is an example from
this post on AJATT, giving an example of a few MCDs to learn 合縁奇縁:
親同士がすすめた結婚で、お互いに不安だらけのスタートでしたが、まさにXXXXX縁奇縁、たいした喧嘩もせずに、いつのまにか50年になりました。
Back:
合
++++++++++++++++++++++++++++++++++++++++
合縁奇縁 あいえんきえん
Front:
親同士がすすめた結婚で、お互いに不安だらけのスタートでしたが、まさに合XXXXX奇縁、たいした喧嘩もせずに、いつのまにか50年になりました。
Back:
縁
++++++++++++++++++++++++++++++++++++++++
合縁奇縁 あいえんきえん
Front:
親同士がすすめた結婚で、お互いに不安だらけのスタートでしたが、まさに合縁XXXXX縁、たいした喧嘩もせずに、いつのまにか50年になりました。
Back:
奇
++++++++++++++++++++++++++++++++++++++++
合縁奇縁 あいえんきえん
Front:
親同士がすすめた結婚で、お互いに不安だらけのスタートでしたが、まさに合縁奇XXXXX、たいした喧嘩もせずに、いつのまにか50年になりました。
Back:
縁
++++++++++++++++++++++++++++++++++++++++
合縁奇縁 あいえんきえん