Since we have to complete 7 of those in T3 to advance to the next rank as opposed to the 3 we had to do in T2, they have to either drastically increase their frequency or change the requirements for the faction ranks.As Skerrit pointed out, they will show up in Tier 3 content, but as there's been only 1-2 secret missions for each faction per season...it's probably best to know that we're not going to see that pace drastically increase.
Because planning on requiring 7 seasons (starting with S4, or are there missions in the S3 T3 adventures) to reach rank 5 seems like people just not being supposed to ever reach it
Not during S4, but during the time it takes to complete T3 (so S7 or S8, but not S10 we'd need with 1 mission per season).It *sounds* like you're assuming that the intent is for anyone to be able to reach Rank 5 during S4
Even so, just one mission per season would be an big bet on the liftetime of AL and 5e in general.ut that a large portion of the player base is expecting / hoping for something closer to the latter.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.