What the modifier does
Vanguards gain 40 (+50 per rank) Attack. Backup.
BackupRank
Vanguards gain 40 (+50 per rank) Attack. Backup.
Vanguards gain 40 (+50 per rank) Attack. Backup.
Base means the hero always has access to that class pool. “Via” means the named Rank B specialization must add the class first.
Search guide notes and complete formations for actual upgrade choices and tradeoffs.