A buddy of mine is looking for a set of Fantasy rules that he can use for mass battles and skirmishes (between 4 and 20 figures per side) without having to resort to 2 or 3 different rule sets. Anybody know of any that can do that without bogging down?
What do you mean by mass battles ? If you mean just getting a lot of figures on the table, but each figure still represents one man / creature (what I would call large skirmish) then there may well be rules that will cater for this (I expect the GW LoTR rules would work). However if you really do mean mass battle (so one figure represents multiple, maybe hundreds of actual combatants) then what you ask is impossible. A ruleset designed for this sort of battle cannot possibly also be used for small skirmishes.