A long, hard season and the pursuit of four trophies is finally beginning to take its toll, with several key players injured or suspended ahead of the last-four clash at Ibrox.
Smith's squad will be stretched to the limit but he refused to be downbeat about his lack of options.
"It makes it easier to pick the team," he said.
"The fewer players you have, the easier it is to select a team.
"We have looked at the opposition and then we will look at our own squad and select from there.
"We have a requisite number available to us so we are quite confident the side we put out will acquit themselves well.
"We haven't played the same system in all the European games we've had this season, we have changed it now and again. For instance, the last time, when we were in Lisbon, we changed it around a little bit.
"We have changed our formation at different times during the European run and, if we have to do so again, then we are quite capable of handling that.
"We were a little bit surprised to reach this stage and it has been a terrific achievement by all the players.
"We have worked extremely hard and have enjoyed a little bit of luck along the way.
"But, now that we're here, we can say for the first time that we are looking forward to two very tough games but also the possibility of getting to a European final.
"For a coach or a player, it's a big thing in their career."