Scene Optimizer and Camera Optimizer are tools to reduce the load. But I would advice you to try to get a GTX1070 if possible. DAZ renders only pics with the GPU that fit in the GPU DEDICATED VIDEO MEMORY. Anything that does not fit is rendered with the CPU. And the problem with the 1060 is that this model only supports 3GB dedicated memory and even with 1080p you reach 3GB easy. A 1060 with 3gb will be as fast as a 1060/6GB in DAZ and will switch to CPU rendering at the same size of pic. A GTX 1070(ti) supports max 8GB dedicated VRAM and scenes will more often fit into the memory of the GPU.
And BTW - you should get more RAM, too. 32GB or more. Because when you render the pic on CPU the pic and the apps running must fit in the RAM and using a swap file will often crash DAZ.