If Saints beat Europa, they will face Croatian side HNK Rijeka in the second qualifying round but Ruscoe is not getting ahead of himself.
Northern Irish sides Coleraine and Crusaders will face Haugesund of Norway and Latvian side FK Liepaja respectively.
The Welsh champions were drawn at home for the first leg, with the fixture set to take place on the 27/28 June. Crusaders will be at home on June 29 and away a week later.
Security force officer injured in Darjeeling clash
The incident, in which several people were injured , prompted the administration to deploy the Army. The state government will hold an all party meeting in Siliguri on June 22 for peace in the hills.
League of Ireland side Derry City will face FC Midtjylland (Denmark), who beat Manchester United past year, in round one.
Under Pedro Caixinha, the Gers will tackle Luxembourg side Proges Niederkorn in the first qualifying round. Ferencvarosi TC (HUN) or FK Jelgava (LVA) await the winners while Shamrock Rovers take on Stjarnan (Iceland) and then FK Mlada Boleslav from the Czech Republic.
St Johnstone's opposition FC Trakai are in the draw after finishing as runners-up to Zalgiris Vilnius in the 2015-16 league.