Ankidrone Sentence Pack is an Anki deck that contains over 44,000 Japanese sentence with native audio. This deck is not to be learned from back to back, its purpose is to aid you in finding example sentences for your targeted sentence cards.
Ajatt-Tools Kanji Transition deck is an Anki Deck for newcomers to Japanese based on the JP1K method. If you want to learn the theory behind this deck, please read this article.
The deck is designed to teach how to recognize Kanji along with the most common 1000 words used in everyday conversations. Prior knowledge of kana is required but there is no need to do any isolated kanji study.
If you have already gone through RTK and know more than 1000 words, you are unlikely to benefit from the deck. However, if your vocabulary is below 1000 words, I recommend that you give the Kanji Transition deck a try over studying kanji in isolation and premade decks like Core or Tango.
The vocabulary used in the deck was taken from Ankidrone Starter Pack and consists of words commonly used in everyday life in Japan. Each sentence in the deck tries to introduce only one unknown word or structure. Each word along with each sentence has native audio and an English translation.
After finishing kanji, kana and essential grammar the bulk of your AJATT journey will consist of learning vocabulary. As the first step in this process, it makes sense to go through a basic vocabulary deck containing the most frequent words in Japanese. As before, you are going to use Anki to do it.
Before diving in to full-fledged immersion learning, memorizing the most frequently used 1 or 2 thousand words is a great way to jumpstart your comprehension. After that learning vocabulary from immersion becomes easier because you'll at least be able to recognize the majority of words in a given sentence. You will still have to look up many words per page, but the process is going to take less effort.