The shadow grim is really only better because you could shuffle the 75 pts into focus for more focus than the edl totem and you'd have the nature bonus. The total amount you could put in focus is what wins. I've found focus over nature magic is better.Havent seen any druids melee on bosses yet, perhaps in other worlds they do, not in our clan anyway.
Also shadow grim is 240 foc 75 vit and 400 nature. In terms of healing bonuses, that is better than edl totem. A druid is a healer after all. 400 nature also improves bark and abundance and all other druid skills including dps.
I don't notice a lot of improvement on skills even when nature goes up. But I sure notice a huge difference when focus goes up. I equipped a shrive set which increases nature by 500 and only had minimal positive results.