If you're cloning and aren't overflowing with SoHMs or SoCMs, clone enough to upgrade every piece of equipment (armor+weaponry). Rest of the scrolls should always be enchantment scrolls. Take a step back from the stack, stand next to it, then zap it with the wand. Revise the stack order to suit your needs (pick up everything if you have to), then zap again. Continue until you've got only one cloning charge remaining.
Wands of mirroring aren't as effective for upgrading equipment, as they are incapable of copying scrolls of harden material or change material. This also means you can just dump your 5 enchantment scrolls in your desired ratio on the ground and zap a wand dry without worrying about the stack order. Pick up and read the mirrored copies between each recharge, as they will disappear after a short while if unused. Examplesituation:
* 6 scroll of enchant weapon
# Clone 4 EA, spider silk whip +11
# Read rest enchant scrolls, you've now got two spider silk whips of thievery +11 with other equipment octiron +6 to +7.
Wands of mirroring aren't as effective for upgrading equipment, as they are incapable of copying scrolls of harden material or change material. This also means you can just dump your 5 enchantment scrolls in your desired ratio on the ground and zap a wand dry without worrying about the stack order. Pick up and read the mirrored copies between each recharge, as they will disappear after a short while if unused.
This may sound difficult, but in practice it's very simple. Just drop scrolls, make sure you're cloning the right ones, clone enough of everything and bueno, you're well-equipped.