Nostalrius Begins - Quality wow vanilla realm (1.12)

Hi guys i start with rogue but is normal i cant kill 1 lvl more of mine... Same mobs are to strong
There is a build tree for it? Think i wrong samething
Thx

Depending on what your tree is,
im 41 rogue atm, soloing and kill mobs at 44> no problem.
depending on your gear there should be many many upgrades also!