Lysander makes better Warlord thanks to being Eternal Warrior. The Warlord Trait is cool, but people can just deny the challenge and deny you that VP. Nobody would wanna fight Lysander in a challenge anyway hahaha..
Taking Vulkan would greatly benefit your list, but he is prone to die to instant death. Both also have pro and cons. You choose lah
Centurions would do better for the list I believe. Try 1st lah, then you'll know which one fit the list better.