Basically, I have only used like these addons on this server and I already have 2 characters +45 and one level 40.
Mobinfo2 - Useful to see your targets hp, but your targets HP is not always fully correct, because this addon calculates the amount of HP from the damage you do to it.
Attackbar - Shows when your autoattack/autoshot is going to be performed. Also shows your target's attack speed. If you happen to download it, "/abar unlock" and "/abar lock" to move it around.
Questhelper pack - This is 3 addons compiled. It has Extended Quest Log3, ShaguQuest, and Cartographer. ShaguQuest is the questhelper itself. Cartographer shows where the quest objective is on the map. It also has the whole map discovered, and you can see every place on the map without having to go there. EQL3 is the addon that makes you able to press the "show" button, which shows where the objective is on the map, and "clean" button, which clears the objective points of your map.
http://shaguquest.ericmauser.de/#englishSorry for not providing the links for mobinfo2 and attackbar but you can probably find them on your own, and if my text was sloppy, really tired at the moment.
