V King Prime : What's Under this Viking's Puzzle?

Today's Puzzle:

Am I just having a series of off days, or was this puzzle harder than a 1* difficulty?

Fantastic puzzle though from Marty Sears!

Link to Play:

V King Prime by Marty Sears https://tinyurl.com/SudokuSleuthViKingPrime

Rules:

Fill the grid with the digits 1-8 so that digits don't repeat in a row or column.

V: Cells separated by a V sum to 5.

KING: Cells separated by a chess king's move may not contain consecutive digits (but could potentially be the same.)

PRIME: Any two adjacent cells along a purple line sum to a prime number.