We play at the same level and pretty much the exact same mentality... It's true that home cup games boost the players morale (this season never lost, now at Top 16) but even then I play defensive formations. Goals win you ties but away goals are more important since they break the tie in goals if any. So it's always better to have a clean sheet at home than a clean sheet at away (an away draw is what you need). But your strategy will confirm a win of the tie if you have 1st leg at home.