Considering how strong you get over the levels, it just isn't feasible.

let's look at how strong PLD's AoE gets over the levels:

Starting AoE = 100 potency per GCD
Level 90 AoE rotation = 405 potency per GCD

(The maths: https://forum.square-enix.com/ffxiv/...=1#post5789193)

So, if PLD were to take everything into, say, Sastasha, things would die much much quicker. Not that anything lats long in there regardless, so having a long rotation is completely pointless as you wouldn't even get the chance to use it. However, how would you change the numbers to suit your needs? How would this then change when you have to balance for Cutter's Cry, the first dungeon PLD gets access to Prominence, which increases the potency per GCD, or Holminster Switch where Magic Circle is available.

However, this was only talking about level 90 rotations, what would happen if you were level 72 with Magic Circle and went into Cutter's Cry? That would require a different balancing formula because your potency per GCD is less than level 90 but still above level 40. Bear in mind, this doesn't take into account Circle of Scorn which is oGCD or Spirit's Within getting upgraded to Expiacion which is ST to AoE.

Even if you figured out something that takes all that into account, we can now move onto the single target combo and all the different iterations for that based on starting level and the level of the dungeon and this is just one job, which also happens to be a tank who has a simple rotation. How would this change based on a DPS? They have far more actions to take into account for both AoE and ST and you would have to balance it all for every job at every level. This also hasn't taken into account defensives or healing as someone else pointed out.

It just is not feasible.

Also, the tomes and exp etc. are your reward for the 'punishment'. If that isn't a good enough incentive, then don't do them. There are plenty of ways to get tomes or exp outside roulettes so you never have to touch them if you don't want to.