Alt -tab boxer stepping up

OK I have been a long term alt-tab 2 account boxer and use this method to boost alts in instances mainly. I have had a dabble with keyclone back when I had lock, mage combo but was so set in the alt tab never gave it a real shot. After 3-4months later and severl forum trolls and search and read of stickies I am going to make an effort in the next few weeks to do it properly ala Keyclone, windowed/split screens on the one machine. My ultimate goal is to have 1 of each possible class to 70 on each account.

Account 1:

1. 70 T5 Warlock with odd BT loot experienced Raiding affliction also PVP kit 404 res, 13k hp, 1000 shdw dmg fg kit.
2. 62 Holy priest (was shadow but respec recently to learn to heal)
3. 42 Druid
4. every other class is ~30-40

Account 2:

1. 70 Paladin (tank) epicced Kara/ZA/Heroic tank
2. 70 Fire mage average geared
3. every other remaing class ~10-20

Account 3:

1. 70 Freshly dinged FG lock
2. 24 Druid
3. Every other remaining class ~10-15

Question is what/how would be the "ideal" way to step into the keyclone world of boxing.

• Get the same classes on each account to be same level then start questing to 70 then look at class synergy?
• Respec the tankadin to a shockadin (regear) and use Main shockadin, alts Fg lock x2?
• Lock main with, alt fire mage, alt 2nd fg lock.
• Level the priest up then combo Main FG Lock, Alt Shdw Priest, Alt Fire mage?

Gearing wise I am thinking BOE craftables (bop depending on professions) & PVP welfare will be the options.

Other than avoiding two different melee types in a 3-toon combo, I wouldn't have thought there'd be too much issues with class combos, as I can see you've got at least one 70 in each account for some boosting.

Personally, I reckon if you're going so far as 3-box it, one or two steps more (and a second monitor) puts you into 5-boxing it and running you're own heroics.