So I noticed you can equip units like Artillery in either the Support slot OR in the Combat slots, in which you can put up to 5. If that's the case, why would one use the support slot at all? Bringing along 5 seems way more powerful. Or is there some other bonus to having it in the Support slot? Of course bringing 5 would cost more equipment but they don't seem to be very expensive/time consuming to make so, that cant be the only drawback surely?