Have you treid moving those few modules (ring mod) at the beginning of the algorithm? That may work. I think that removing both chorus and reverb is too much. You shouldn't really need that.
DSP work in realtime. It's different from computers. If an algorithm is compiled, the unused fx still take resources as they exist. Same thing on a computer: the algorithm slot allocation has a fixed size for the plugin. If you don't use it, the CPU won't work…but if you use it and some parts of it are not, they still take up space that could hve been used for a better/larger version of the used fx.
best
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