This is how Priority Boarding should work on EI:
Short-Haul
PRIORITY GROUPS
Group 1 - Concierge & Advantage Ticket Holders
Group 2 - Platinum & Plus Ticket Holders
Group 3 - Silver & Those who purchased seats upfront
NON-PRIORITY GROUPS
Group 4 - Expensive Saver Tickets
Group 5 - Cheap Saver Tickets
Long-Haul
PRIORITY
Group 1 - Concierge & Business Class
Group 2 - Platinum & Economy Flex
Group 3 - Silver & Those who purchased seats upfront
NON-PRIORTIY
Group 4 - Smart Fare
Group 5 - Saver Fare