^Yes, I think V is the hardest of all of them. But to be fair I can't accurately judge 3, because I've only played the iOS version and while that's kinda cool, it's totally different from the original.
OK so, I did the worst thing in the world last night while playing. Made some excellent progress (I just have the final dungeon to do, wooo) and I have all the summons including Bahamut, Hydra (or Syldra in the retranslated version I'm playing), and Phoenix. Words cannot express how boring I found the Phoenix Tower.
I also mastered a lot of their jobs by grinding - but I cheated slightly. I moved the game off the PSP and started playing on my PC to make sure the loss of 6 hours incident never happens again, but in doing so discovered the fast forward button. Boy does it make me happy. Spent about an hour in fast forward mode running back and forward on the world map just levelling jobs by holding X, slowing down and healing when required. It really bulked up my time.
Of course I'm now left with the problem of wanting to master every job class, because I've mastered all of them seperately and more than half on each character. This has resulted in me with 3 monks using X-Fight from the hunter class (8 HITS PER CHARACTER!) and they're all around level 75, which is ridiculously high for this game. I've never been above level 50 any other time I played through it. So I think I might try to take on Shinryu.
EDIT: Got caught up in what I was writing and forgot to mention the "WORST THING IN THE WORLD" that happened because I'm a fucking idiot - I was levelling 2 ninjas and somehow accidentally managed to "Throw" the EXCALIBUR. Yes, the real, full on excalibur, not even the shitty one. The worst part is, I was holding X so I didn't notice until 3 hours later and I was like... where is my sword.
Gone. Save over the last file already, saved over the save states, everything. I've decided I don't care, after all it's only one sword
.