The interesting part is that the story never sets a number for perpetuation. 2 MP per tick at level 80 would have been just as reasonable from a story perspective. The actual size is just SE employees picking random numbers out of thin air and putting into the game.
Something that they should have observed all these years is carbuncle, which is heavily used as the pet that stays out. Not only has it 2 perpetuation less than competition, it halves that with an item. Meaning the ideal perpetuation decided on by the whole community is half of what we get.
Furthermore the basic idea, if it ever existed, should have been to restrict the time an avatar is around. Time is easily determined by MP/perpetuation*3. So these days at 80 you'd expect roughly 1000/15*3 = 200 seconds. Or ~3 min. If you are kind enough to include Favors and perhaps some -4 or so perpetuation, the calculation turns into 1000/9*3 = 333 or 6.5 min. Even a very well geared SMN would be looking at something like 1000/3*3 = 1000 seconds, or 16.5 minutes.
To reach that level though, you need all 8 staffs from magian trials which means kill 1175*8 mobs, or 9400 EP during day/weather.
It is hard to call it fair that a DRG only needs to avoid AOE damage to hit their wyvern for 16 minutes to keep it alive that long, but a SMN needs to kill 10 000 easy preys to match it... for level 80. Post 80 it will again become worse and require some 2500 more mobs extra per -perpetuation. Compared to Nirvana that needs 6500 kills, 10 000 kills is a bit extreme.
I don't know really. A PLD just have to walk out and make 1 or 2 -pdt swords, which can be leveled with dual wield at the same time. A SMN needs to make 8 staffs one at a time. I doubt even BLMs feel that they'll lose 13% damage if they do not level up 8 elemental nuke staffs.
No. Perpetuation needs to be fixed ASAP. Magian trial weapons also needs fixing, because it is unreasonable to force SMNs to get 8 magian weapons just to cancel out perpetuation increases. I have bahamut staff to cut down on inventory cloggage (I actually have 5 slots left, and couldn't even carry 8 new elemental staffs if I had them)
It is wrong. It is unfair. It is unreasonable. It is again Summoner that is the only one suffering. And it is completely expected, because SE has never shown a hint at caring for the class. As a casual programmer I could have solved all this in a week. Their expert programmers can't even do it in 10 years. If that isn't classed as not caring, I don't know what is.