I’d follow up with St Francis de Sales’ Introduction to the Devout Life. Don’t let the “Introduction” fool you into thinking that this book is only for beginners.
Also note that St Francis de Sales had a Jesuit spiritual advisor and went through the Spiritual Exercises himself. There is an Ignatian influence in Salesian spirituality.
If you’d like to continue along the lines of St Teresa of Avila or St John of the Cross, I’d recommend first reading Fr Dubay’s Fire Within.
This book is the fruit of Fr. Dubay’s many years of study and experience in spiritual direction and in it he synthesizes the teachings on prayer of the two great doctors of the Church on prayer–St. John of the Cross and St. Teresa of Avila–and the teaching of Sacred Scripture.
But the teaching that Fr. Dubay synthesized is not collected from Teresa and John for contemplatives alone. It is meant for every Christian and is based on the Gospel imperative of personal prayer and the call to holiness. All the major elements of these great teachers are ordered, commented on and put in the context of their scriptural foundations. Here is an outstanding book on prayer and the spiritual life written by one of the best spiritual directors and retreat masters of our time, and based on the writings of the Church’s two greatest mystical doctors.