I've been experimenting with teleport crystal strategies to minimize banking and make it so you never need to drop any items (max afk) while only banking at the beginning and ending of clan thieving cycles.
This is all assuming all banking is done by using a preset to withdraw an empty invent + 1 teleport crystal(3).
5 clan strategy: (will leave you with a bunch of teleport(1)'s)
Start at max guild bank or something, bank.
Teleport to Meilyr and bank, then bank again when done with Meilyr
Trah, bank at end
Doing this, you minimize banking time while never having your inventory get full.
However, I think using a 6 clan strategy is better for crystal teleporting, since then you don't have a bunch of (1) charges at the end. In this case something that works well is:
Meilyr, Bank, then bank again after finish
Trahearn, Bank at start and manually withdraw (1)charge
Cryws, bank at end.