A platform ladder much easier to use. Never used a cutting in brush just decent brushes. An extension pole. And a good Stanley knife/scissors if doing wallpaper.
I like the range from ProDec. Really competitively priced for the quality it offers. The one thing I wouldn’t be without is a roller extension pole. Great for walls and ceilings.
I only use dulux brushes including a cutting in brush a paint tray with liners yellow frog tape rollers fluffy ones I do have an extension pole but I perfer to use a ladder.