[Dimaz]

Sea kings have regen, quickness, cold and poison res and some prot without items. With helmet and fb you have fr also. With vine shield and rainbow armor, ama and resilience it's a killing machine with more chances to survive battle involving lots of mages than Grendelkin, unless you equip Grendelkin with resistance items only, but SK also deals lots of damage with quickness. I managed to kill equipped tarts with such sea kings. And before EDM they were *the* water summon, unless you needed water queens for underwater conquest. With CBM1.6 (I never played later versions) + EDM it's a hard choice for me between Grendels and Sea kings. Also, the free units are really nice under Army of *+ FW + AM + MR. They can absorb lots of damage and act as a very good shield due to high HP.