Which monster do you like the most in Heroes 5 (level 4)?

In general, lizards are expendable units. They only need to withstand one wave of enemies, and then they can die. Shamans are also useful; Orcs don't have great initiative, so they make up for it. (As long as there are available slots, I always have half shamans.) Theoretically, Earth Daughters can break through enemies who are defending with readiness, because their ability ignores this readiness, and the Daughters still attack without retaliation (a bug or a feature?). I don't know how effective it is, but you can at least take down some combat griffons this way. Alternate Berserkers are tough; they hit very hard, but they die quickly. Griffons are undoubtedly good, but they die quickly... And the AI loves to target them. And un-upgraded ones aren't very effective; upgrading them is very expensive.