The Scottish Premiership giants go into the second leg of their third-round qualifier in Slovenia leading 3-1, from a game that Jack missed due to concussion.
Angers loanee Coulibaly limped off during Gers' 2-0 win over St Mirren on Sunday with a slight knock, while Arfield sat out the league game at Ibrox.
"Ryan is back in full training today so assuming he gets through today and tomorrow he will be available for selection," Gerrard told the Rangers website. "It could be a huge boost because I think he is in great form and I think he has played a very important role for us so far.
"Lassana has recovered quite well and we don't think it is a big issue, we think it is more down to maybe fatigue... It is a big game Thursday and we will have to wait and see what he is like in the next 48 hours before we make a decision on him.
"Scott was just rested at the weekend, he had two or three weeks out with his knee and then he came back and played two full games, one of them was with ten men against Aberdeen. We had to protect him at the weekend so the idea was just to rest him - he had a little bit of a small issue but nothing major."
Rangers will also be in action at the weekend, travelling to Kilmarnock for a Scottish Premiership encounter on Sunday.