The No Focus Manifesto assists based on target.

It has a "Big Button", where you target and follow, based on a predetermined order.
The first living toon (for 5 boxing) is targeted by the others.

The first toon targets whatever it wants to kill.
All of the others have:

#show Lightning Bolt
/cast [target=target, harm, nodead] [target=targettarget, harm, nodead] Lightning Bolt

The first condition lets a slave toon attack its own target, if you choose to have it target something different.
For example, I have a 5-team, but my miner has flown a little ways off to get some ore.
I can have her nuke a nearby hostile critter a couple of times, and then get the ore.

The second condition is to cast the spell at the target of your target.
The big button has you target the toon of your choice.