i find them lacking compared to their ranged counterparts. Yeah they dish out great damage but they have to be really close, they just get focused down really easily.
thye cost 7 points but by mid game they are already lacking.. maybe its just me.
using teleport doesnt help too much. they either get focused down as they are walking before they arrive [if the plan is to teleport out], or as they are walking out [if they teleported in]