I very much like the outline of the opening books from
Chess Star Publishing and their "three step approach" which makes learning the appropriate amount of theory or ideas much easier.
Vladimir Barsky's "The Modern Philidor Defence" offer a few useful pieces of advice for the Silver Tape Repertoire. The tweet sized summary is to play "1. e4 d6" to reach the backbone structure of the Silver Tape repertoire (See previous post).
How about the typical Philidor endgame (1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. dxe5 dxe5 5. Qxd8+ Kxd8)? According to Vladimir gets some initiative but it is still a chess game.