I think the decimator would be the worst ship to bring to epic. big fat target for turbos with no evade, no reinforce, nada. I think huge ships will just melt them.
The effort it will take them to do that will take up around 2 or three rounds of firing. That's a lot of energy burned for a 40-point ship. It will also require your opponent to actually field turbolasers, which have a huge range 1-2 limitation and struggle against the other small fighters in the Imperial arsenal.