Put this in a script:

function changeInfuse(infuse_arg)
infuse = infuse_arg
end

function changeStrike(strike_arg)
strike = strike_arg
end

And then, make an alias for each strike like this:

changeStrike("STERNUM")
cecho("STRIKE CHANGED TO STERNUM")

For infusions, do this:

changeInfuse("FIRE")
cecho("INFUSION CHANGED TO FIRE")

Last, but not least... the macros:

send("INFUSE " .. infuse)
send("COMPASSSLASH " .. target .. " NORTH")
send("STRIKE " .. target.." " .. strike)