Casual counts the loadout you start the match with - mid-match swaps are not tracked.
Specializations Tier List Season 12
TIER S specializations
The best top-tier specializations for each class in The Finals Season 12. They are the most efficient for most scenarios and modes
TIER A specializations
The most successful specializations used by the majority of players, aside from the top S-tier list
TIER B specializations
Mid-level specializations that are somewhat situational but still popular and successful among many users
TIER C specializations
Less popular specializations that are even more situational and require specific conditions to be effective in matches