'link' - Xcom 2 Long War Guide
Infiltration is the most critical addition to LW2. When you launch a mission, your squad "waits" at the site to prepare.
Aim for at least 100% infiltration on every mission. Launching at 0% will result in "Swarming" enemy activity, making victory nearly impossible. xcom 2 long war guide
Larger squads take much longer to infiltrate. For most early missions, a squad of 4–6 soldiers is the "sweet spot" for hitting 100% infiltration within typical 5-to-8-day mission windows. Infiltration is the most critical addition to LW2
In the early game, assign almost all rebels to Intel . This is the only way to detect missions early enough to have sufficient time for infiltration. Launching at 0% will result in "Swarming" enemy
If you find a vital mission with a short timer, you can spend Intel to "Boost Infiltration," which increases the infiltration rate by 50%. 3. Tactical Combat and Squad Composition