Honestly, for your need, use the transpose function.
I have a song with my band at 1/2 downdrop, it's good enough.
Just one recommendation ; play loud and only stay focus on speaker's sound.
I had a Helix + Variax before and used the virtual capo to do the same.
The variax has piezzo pickups so it's more "precise" (string per string).
Nevertheless, when i used to rehearsal at home with my headphone (an opened one), or play on the cab, i thought ; what this Sh!t !
In fact, you hear clearly the natural sound of your guitar and it's very disturbing in this case....So push the volume up !!!!