Practise with fast détaché or sautillé to help develop a clean left-hand finger action in this study by Hans Sitt to help develop a clean left-hand finger action.
There are many good facility studies. This Study No.5 by Hans Sitt is good because it uses standard finger patterns and stays in one position (first position). Scales in One Position by Galamian are also useful for the same reason.
Your fingering should use 4th finger to avoid crossing strings just for one note, otherwise it is fine to use open strings.
Resources - Repertoire
- for School of Velocity for the Violin, Book 1, Op.135 by Hans Sitt