Here is a nice route via GuÃa de Isora, Chio and Arguayo, leaving from Abama.
The Masca route via Tamaimo and Santiago del Teide, also leaving from Abama. Return via Buenavista del Norte, Garachico, El Tanque & Erjos. Note the location of the start of the El Tanque climb.
A much shorter loop maybe for the first/last day or else a “recovery ride”.
You can also travel up the road directly opposite Abama and then link up with TF465. They’re not connected on google maps, but with a bicycle you can do it.