Solo'd most of 1-37 Blm style but it was definately getting harder then doing so as Blm. You are missing some very important spells by this point, ie:
Bind (Probably the most painful one)
Sleep/Sleepga (Next in line)
Aero II/Thundaga and @38 Fire II
Not having Bind and sleep mean that, essentially, there is no way for you to keep up shadows throughout a fight. You will take damage; yes you can Regen/Heal that missing HP but it results in longer resting times and broken chains. On a positive note you will recover from taking a beating alot more quickly then a Blm but it is far better to not take on in the first place.
Because you lack higher tier nukes you will have to cast more spells per mob. This results in slower kills, more damage being taken, shorter chains, etc...
Finally the defecit in Elemental Skill even with Dark Arts up is starting to show. Resists for me were pretty common, especially on T(EM +3) and VT pets. If you are fortunate enough to have Elemental Merits then this will probably not be an issue but for me it, once again, resulted in shorter chains and more downtime.
Finally, on the plus side, the reduced casting time from Dark Arts makes avoiding interupts much easier and Alacrity can be a real savior if things turn ugly.
Edit - my peak solo XP/Hr was in Yhoator at level 27 killing Goblin's Bees for about 6K/Hr. Otherwise XP has run from 2-5K/Hr. Edited, Feb 14th 2008 6:48am by Bladestriker
75 Bst,75 War,72 Thf,61 Pld,51 Rng,51 Blu,50 Drg,48 Cor,48 Rdm,42 Whm,42 Brd,40 Blm,38 Smn,37 Mnk,37 Nin,37 Sam,37 Drk,37 Pup,37 Dnc,37 Sch
Adventuring Fellow - 70