After several encounters with the Galactica and Pegasus the Cylons figured out that a Baseship was inferior to a Battlestar in direct one on one combat, therefore they deceided to build a Basestar/ Warstar which was focussed on close ship to ship combat. Using technology salvaged from disabled Valkyrie class Battlestars the Adonis was built, a ship much sturdier than a Baseship.
The Adonis sacrifices Raider capacity for firepower, 2*2*4 Heavy spinal KEWs are able to tear almost every ship, even the most armored ones, apart. These Heavy KEWs only had one very unpleasant side effect, their vibrations damaged hybrids and the synthoorganic structure usually used by cylons, therefore the Adonis has a much more "conservative" design, not as streamlined as the normal cylon ships, also the gravimetric drive system was affected by the guns, so the Cylons deceided to add "normal" sublight drives as backup. It should also be noted that the Adonis usually has a "working" crew of both mechanical and synthoorganic cylons.
Adonis class Skirmishstar/ Agressive Baseship
2*2*4 spinal HKEW
4*4 dual turret KEWs, railgun type
4*2*10 improved guided missile launchers
4*20 launchers for normal raiders + 20 War Raiders + 20 Heavy Raiders with 4 hangars
2* cylon grav drive (main)
2* cylon grav drive (backup)
2*2 Thruster with gravimetric vectoring system
2* cylon ftl system
inspired by the reimagined Battlestar Galactica by Ronald D Moore, BSG belongs to universal