I can tell you what worked for me including a nice little calf routine I do every 2nd time im in the gym if you want?pm if so.
Ok, if using only IGF then train calves first in the workout then immediately head to the toilet and pin 25mcg in each inner head.
2 days later again train them first then head to toilet and pin 25mcg in each outer head.
Then just repeat this and yes train them 3 times a week, for a muscle as stubborn as calves it works very well.
I would recommend the addition of MGf(non-peg). I stick 500mcg into each calf a few hours before the workout.