Since we have the EXP campaign going on I figured I'd post this path I've been using to get some jobs to 99 quick with zero gear equipped. Though I usually bring a LVL 1 weapon just to be able to swing for whatever skill ups I can get.
First hour takes you all the way to 80. Trusts used are Valaineral, Tenzen, Semih Lafihna, Shanttoto II, and King of Hearts. AAEV works pretty well over 40, but Uriel Blade pretty nice on Valaineral, also atm on the fence between Zeid II and Tenzen. But for now this set up is working really well so I'm holding to it.
LVL 1-10 -
Walk form Bastok Mines to Bastok Markets. Every time you engage a mob Val will open the fight with a Uriel Blade one-shotting that monster and anything else within range.
10-23 -
Survival Guide to Konschat Highlands, zone to Valkurm Dunes and walk to the outpost, killing stuff a long the way.
23-30/31 -
Survival Guide to Qufim Island and kill stuff around the tower until about 30/31.
30/31 - 42 -
Survival Guide to Crawlers' Nest and kill your way to the big circle drop. Kill the lizard there and whatever crawlers you see in the tunnel ends.
Here is goes really fast since trusts seem to get some really nice stat boosts in Escha. They never run out of MP no matter how "hairy" things get. and Val can Uriel Blade tank like 4-5 mobs or probably even more without even breaking a sweat so need to worry about linking anything. Don't even need to refresh the trusts more than when you change camps. Since they get the stat boost they can hold a constant chain all the way until you change camps.
43 -54 -
Eschan Worms/leeches at the start
53/54 - 63-64 -
coeurl camp at 2 is really compact and really nice for fast pulling.
64-73 -
Skeletons/corses/birds north of 4.
73-80 -
Snapweed/Bees/Goobues South of 4.
After this it gets a little slower since Escha - Zitah does have any EXP mobs past 80. After goobue camp the next mobs are 107-110. Techincally the trusts can handle them fine without even coming close to dying, but their DPS on them drops significantly since the level jumps a lot higher.
80-86 -
Orihalcumshells in Mount Zhayolm, Use the HP and use a mount to go north.
86-90 - Duriumshells in Vunkerl S. Use the Survival Guide and walk around to H-7. This one is a bit of a walk, but really nice since they are so packed together. Really nice for killing multiples with Uriel Blade.
90-99
Back to Escha - Zitah. Go to the 107 eft camp. By the time you hit 90 the trusts can handle them decently enough, and like before since they get super buffed in Escha it make it pretty brainless.
This is actually without EXP Rings. So if you have Eschad Ring and Caliber Rings you can speed it up even more.
Happy campaign EXP'ing!