I recently discovered the multiplying effect of offense and have developed a strategy to take advantage of it detailed in this thread: https://forums.galaxy-of-heroes.starwars.ea.com/discussion/178283/droids-vs-sion-after-new-mod-updates#latest
IG-88 could potentially get a series of multipliers on his offense fighting against Sion under a Poggle lead. 1.8 from his unique, 1.3 from Poggle lead, 1.5 from offense up and 2.0 from cycle of suffering. This would make the amount of offense he gets from an offense set: 263 * 1.8 * 1.3 * 1.5 * 2 = 1846 offense provided by the offense set in that scenario, Considering that 263 offense is a roughly 11% increase in damage, This makes the offense provided by the set about a 77% increase in damage in that particular composition.
The offense set and crit damage set may both say they are a % increase, but when it comes down to it, the offense set really adds a flat value, while crit damage is always a %. It's because of this difference that the value of one is actually modified by multipliers, and the other is not.
