I'm running a
70 Prot Pally + 61 Holy Pally + 64 Shadow Priest
this time as my entry into 3-boxing
(3 computers and 3 monitors setup)

I just setup up Keyclone last night and using 1 keyboard to control 3 is throwing me off for starters as I get use to not using the keyboards on the other 2 computers.

1. I suppose, I need to approach this in the way how I play my Prot Pally (tank) and find ways to optimize keypresses using cast sequences, and wow macros.

2. And based on the keypresses of the Prot Pally, I need to find un-used keys and save them specifically for the Healer and DPS.

3. Then based on step 2, find likely shareable cast sequence and key presses for Healer and DPS to join while the tank has established agro.

Combat

1. Tank pulls with Avenging Shield and sometimes with Avenging Wrath--yeah I aoe Pull 3+ mobs.

Key: U (avenging wrath)
Key: I (avenging shield)

2. The tank ducks out of line of sight. Does a Seal (light wisdom, or righteousness), Holy Shield.

Key 3: Seal of Light
Key 5: Holy Shield
Key 2: Judgement

3. Then proceeds to Seal of Righteousness, Judge /cast sequence. Holy Shield and Consecrate as needed.

Key 1: /castsequence SoR, Judgement
Key 7: Consecration

4. Also as needed Exorcism, Hammer of Wrath, Mana Tap, Arcane Torrents, Righteous Defense (taunt).

Key 4: Exorcism
Key ~: Hammer of Wrath
Key [: Mana Tap
Key ]: Arcane Torrents
Key \: Righteous Defense

5. Other combat keys

Key Z: dodge trinket
Key V: shield block trinket

Out Combat & Buffs

Key -: drink
Key F6: Crusader Aura
Key F7: Single Sanctuary
Key F8: Greater Salvation
Key F9: Single Wisdom
Key F10: Greater Kings
Key F11: Righteous Fury
Key F12: Retribution Aura

Current Issue

Key F: Flash of Light
Key G: Holy Light

The healer and dps uses:
Key F: Follow, Assist Tank
Key G: Set Focus Tank
Key H: Spread (using strafe keybinds)

(this is a work in progress as I recall what keys I use for the healer and shdow priest.)