i'd not want to drive a SM with no weapon and just a limited amount of support supplies. i'd say go with one or the other (IMO, the sensor dispenser would be most useful since a SM makes a great scout), and stick a small laser, or even an ERsmall to make it capable of self defense. Ersmall would be preferable once the tech becomes available, for the increased range.
That seems like trying to do too much with too little to me. Larger units can go multipurpose, but at the scale of the Savannah Master you really have to specialize. Be either a strike tank or a support unit, but not both. To me, what you propose would end up being armed just enough to get itself killed, especially since scout duties usually imply solo deployments instead of the roving packs usually used by S_Ms. As an example, look at the Lexan. It tries to be both a scout and a combat VTOL, and winds up being poor at both roles.