Should be easier than this..

[TheGreek]

Just been practicing a little etude I found on YT - just some scales  major up, minor down - so 1,3,5 in a major scale(A,Db,E), 5,3,1 (E,C,A) in a minor scale. 

The "natural" fingering in the major scale is 2nd, 1st, 4th finger but the fingering in the minor scale is 3rd, 4th, 1st.

I hadn't played this before - requires you to swap the fingers that you start and finish the riff with. Much more difficult than you'd expect. 

Try it and see.

[itu]

A major comment:

A C# E.

 

A major has 3 sharps and they are F#, C#, G#. A major cannot have a D flat in it. D is the fourth note of the scale, not the third.

 

Sometimes it is feasible to use a flat (or a sharp) in the middle of sharps (or flats), but legibility dictates that you should use only one or the other way with basic majors and minors.

Edited December 11, 2023 by itu

[Fishfacefour]

Have you tried using finger 3 for the 5th? that frees up your 4th finger for the minor third on the way down. 

[JoeEvans]

I'd do that double bass style with a shift, either as Fishfacefour suggests, or 1 (shift) 4 - 1, 1 - 2 (shift) 1.