Your own materials with English phrases and thematic sentences

My idea below may be important to you to improve your English materials.
As you know word combinations in speaking are unpredictable. There are different word phrases, expressions and synonyms to convey a thought in English. It's possible to encompass in ready-made materials a wide variety of English phrases for each conversation topic. It is a good idea to prepare a potential list of phrases with sentences on each conversation topic, for example fixed conversational phrases that do not require English grammar knowledge (greetings, forms of addressing a person, thanks, well-wishing, apology, agreeing, disagreeing, emotions, etc.).
Practising English with such materials can help a learner easier choose the most appropriate word combinations to convey a thought.
Multiple frequent reading of such sentences in English will gradually ensure firm memorisation of English vocabulary and contribute to developing good speaking skills.
By combining the most inclusive English phrase books, conversation books, general English thematic dictionaries, software, audio and video aids and websites you can create the most practical and thorough content for mastering each conversation topic in English for all levels including a wide selection of ready-to-use phrases, vocabulary and sentences for daily use.
Your own ready-made materials could be more complete and more helpful than any conversation book or a phrase book in terms of useful comprehensive content and vocabulary.