Hey all, brand new to AoS and I just bought the Start Collecting: Seraphon box. It seems I have the option to assemble some of my Saurus Warriors and Knights as Alphas, Icon Bearers, and Wardrummers. Having at least 1 Alpha per unit seems like pure upside, and like something I should do? But I'm less clear on Icon Bearers and Wardrummers after reading their Warscrolls. Do they still get to attack as normal if they're Icon Bearers/Wardrummers, or do they only get the Icon Bearer/Wardrummer special abilities? If so, is there any reason not to build one of each per unit? Thanks, and I appreciate your help!