No one barely runs these anymore, especially CT and ST, whats worse is that once the duty finder matches us with 2/3s of an alliance a few minutes later half of that has been put into another alliance, restarting that god awful wait again.
I kinda suggest implementing exp in Crystal Tower, but we get the exp after defeating the final boss, but that's not all, the exp we get is based on how many bosses we fought, this may reduce people try to get inprogress runs for quick exp, god knows its annoying as it is for The Gift of the Archmagus quest.
Possibly have increased exp from the first bosses then slightly less from each boss, this may also entice players to join from the start.