Leveling as a returning player?

[vienne]

First of all wb
I've recently picked the game up again for the 20th time, the easiest way i have found to lvl was to unlock some trust npc's (kupipi, Valaineral and Prishe are the ones i use, basically tank, DD and healer).
lvl 45...Garlaige citadel perhaps or crawler's nest
Think as a lvl 65~69 you could fight T's or VT in the boyahda tree and the chains in combination with the GoV pages and maybe an exp band are quick exp, maybe get 2 DD and 1 healing trust. round 75 Zeruhn mines is a valid option.
some helpfull links for you on trust
http://wiki.ffxiclopedia.org/wiki/Alter_Egos
http://wiki.ffxiclopedia.org/wiki/Category:Trust
They've done some changes to campaign too, but havent tried them out but the exp there shouldnt be all that bad and if i read correct then you can now get skill ups in campaign.
I do have noticed to never see aby/book burn shouts anymore in jeuno, atleast not on my server.
Good luck exping and maybe some other people on this forum have some more tips that i dont know

[Novae]

Thanks a lot for the reply.
I got my 3 trusty Trust (harh harh) NPC's - using Trion as Tank (doing a surprisingly good job at that) and Ajido-Marujido and Ayame for DD.
Was in Bostaunieux Oubliette killing the leeches, but damn it took a while killing just a single one; I kinda need new weapons and gear too, but that's hard to come by as well, haha.
I was really hoping it would have been easier to get to 99, and then be able to do the story lines, and run around having a blast at being OPed and do all the old stuff I missed out on the first time around.