As an expert of the PE and player that is ranked top 10 on the automatch leader boards, T1 is more useful than what it is normally thought of.First, T1 makes your infantry stronger with 4 man squad size. If you are going for assault grenadier squads, this is a must (increases DPS to fully upgraded storm troopers). 4 man g43's are also very effective, especially with vet sarge upgrade.