Ok here are some level recommendations to be at the minimum for taking on the storyline bosses. Feel free to put in some suggestions of your own guys.



Air Cutter -3
Rogue Tomatoe -3
4 Imperial Swordsmen -4
4 Flans -5
Firemane -6
Mimic Queen -10
Ba'Gamnan, Bwagi, Gijuk, and Rinok, if ya wanna beat them -14
2 Judges, 3 Imperial Swordsmen, and a Imperial Magus -14
Ghis -15
Garuda -17
2nd Demon Wall, the storyline one -18
Belias -19
Vossler -20
Tiamat -24
Elder Wyrm -25
Vinisukar -26
Mateus -27
Bergan -28
The 5 Mandragoras -34
Ahirman -35
Doctor Cid -38
Rafflaseia -39
Deadalus -40
Tyrant -41
Shemazhai -42
Hydro -43
Pandaemonium -44
Slyt -44
Fenrir -45
Hasmal -45
Gabranth -45
Doctor Cid and Famfrit -45
Gabranth, in the Skyfortress Bahamut -47
Vayne, all his forms -49

Now here are some level recommendations for most of the optional bosses and hunts:

Flowering Cactiod -4
Theaxtra -6
Wraith -9
Nidhogg -16
Rocktoise -17
Cluckatrice -18
Wyvern Lord -21
1st Demon Wall, the optional one -22
Croacadile -24
Enkelados -25
Ixtab -26
Earth Tyrant -27
Feral Retriever -29
Atmos -31
Mind Flayer -31
Othoros -31
White Mousse -32
Vorpal Bunny -32
Bomb King -33
Ring Wyrm -33
Braegh -34
Gil Snapper -35
Adrammalech -39
Marilith -40
Darksteel -42
Bloodwing -43
Catobleas -43
Trickster -43
Exodus -44
Vyraal -44
Piscodaemon -45
Zalera -45
Roblon -45
Overlord -46
Antilion -46
Deathscythe -47
Cuchulain -47
Zeromus -48
Goliath -48
Fury -49
Humbaba -49
Belito -49
Wild Malboro -50
Choas -50
Lindwyrm -50
Deathgaze -52
Diablos -53
Ultima -55
Ixion -60
Zodiark -65
Shadowseer -70

So anyone got level suggestions for all the rank 7 hunts, the Hell Wyrm, Omega and Yizzie?

Some of those are a little higher than expected, but yes, those are what I recommend too.

As for Omega and Yiazmat I'd say around Lv 75.
For Hell Wyrm, well Lv 55+, sine he's easy.

God I don't think I was at any of those levels when I did most of them.