I'm a casual player who only plays the game during free login campaigns and subs for maybe 1-2 months a year at most, and even I managed to clear FT. The fights after the first boss (since it's very easy) are honestly no harder than an extreme trial in difficulty and will be so much more easier to learn now that the time to enter the Tower has significantly been reduced due to recent fixes! The worst part of FT before the fixes was having to spend upwards of an hour "instance progging" (if you were really unlucky) then another 40 ish minutes in OC waiting for the weather, only to wipe to snowballs at boss 2 and then having to spend another 30 minutes before being able to re-enter the Tower. These fixes are a godsend in comparison, and will definitely making learning FT so much better and accessible!