The important thing to remember for Guards is that very rarely, barring other Guards, will people attack you on careful
Therefore Strafez is your best friend, and also G class
Stacking with neutrals would also be nice, but this is not really cost effective with a low guard income and high base pr
My advice wld be to always have 1 if not really 2 stacks with queens and runners, and mix it up between stacks 1-4, so if as is inevitable someone attacks you with missile class, or large hull ships i.e herc, tyr, thor, angel, etc
Even if your top stack is say , rubies, and they hit with hercs, your queens will annihalate the larger ships in the second round, and if you have dummis all the better
Also unless you are defensive, i would half to quarter spam, but full stacks on defense work wonders through the rounds systems, particularly if you have one strafez stack high (1-4), and 1 low(7-10)
But i haven;t been Guard in ages, try to Pm some big old Guards, as they know all the tricks in the books
Also fodder can still be your friend !