Two of Brian Challenger’s Super Fiendish, 17 and 27, are put together because solution paths are short.

Stage right is the Sufi 17 line marked grid with an immediate, and decisive, XY nice loop.

The follow up features an early  naked triple c2nt234.

A basic trace that gets you to the grid above:

Now you’re prepared for a bypass finish in Super Fiendish 27:

Solutions:           17:                                                                                       27