Coombs said: "I am really keen to get out on the field now, I am feeling good and I can't wait to play.
"The strength and depth we have is fantastic and we've never had that option before when the boys have gone away to Wales camp. To see people like Rob Sidoli play out of their comfort zone is fantastic. Sid comes with a lot of experience so the younger boys are learning a lot from him, he's important to have around."
On the challenge of taking on French side Bordeaux, Coombs added: "We have to win this home game as it's going to be a tough trip going over there. We need to play well here and get some confidence and then try for the win away from home."
Jones has made nine changes to his side. Full back Dan Evans retains his place and is joined in the back three by Matthew Pewtner and Amos. The centre pairing takes on a different shape with Pat Leach and Ashley Smith combining while Jason Tovey retains his place at outside half. Wayne Evans steps into the scrum half position, making his first home start of the season.
In the front row, Hugh Gustafson returns to his previous position of loose head prop. He is joined by Sam Parry at hooker and Dan Way at tight head prop. Lewis Evans keeps his place at blindside flanker, with Nic Cudd and British and Irish Lion Faletau making up the rest of the back row.