Alt click on a node connection automatically disconnect it from the other nodes. And there is some nodes which can be easily summoned by pressing a key and clicking at the same time. Like B+click will place a branch, and S+click a sequence.
If you're willing to compile it, Aseprite is a great option as well.
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EISKO released their 2017 head data package, a product for both VFX/offline and real-time environments. The pack features a full female head model (both low and high poly versions) and some high-quality physically-based 4K textures for face and head props from the studio’s capture system. The best thing is that it’s all free. Go on their website or download a version here, download a version of the datapack and start building up your render scene, be it in Arnold, V-Ray, Unreal, Unity, etc.
A closer look at the project:
On the left, a ref photo under flash+daylight conditions, and on the right, a render with no comp but a slim hair mask and background. This was done in Arnold and Maya with a home made skin shader, and using the VFX data.
Make sure to find more details on the project here.