Don't need a lot of health @ low level, dungeons are designed around you having the minimum gear to begin with. Nobody pulls big and there aren't any tank busters, so you can go with full STR accessories 30/30 STR. STR also equals threat, which is the usual issue with low level tanking. That said, you don't need to go all out if you don't want to, just know that to gain more threat you need more STR.