AoS Kroxigor, Are they usefull?

that's a fair point, but even if they die right away, because they are cheap and efficient they do their job of buying turns. and you can position them to force the large base of that FECZD to not be able to bypass them. maybe its just the tyranids player in me (started in 3rd edition with explosion templates *shudder*) but this is still the better of the two powers based on our current ability to play and win games. summoning is great, at the cost of spells we don't really have so the down side is minimal... skinks are cheap and fast and horde based and have an ability to run away and force a turn stall SOME of the time. again no real down side. but summoning alone cant win the game. skinks manipulating turns and zoning objectives can