I'm going to make this simple and short with specific comments and compliments.

Heart of Ice -

I loved everything about this mission except a few things. The boss was amazing, the surrounding monsters were perfect for the battle, but the boss itself is in need of a health boost just as the other forum posts say. And I was thinking of maybe adding on some sort of defense for him. For example, Vanaduke has fire cycling him in stage 3 and 5. Maybe give Maulos ( I think that's his name) some sort of freeze aura or make stronger devilites attack you while you're trying to attack him, almost like body guards. Other then the boss, the arena could use a small boost in monsters and challenge. The design, story, difficulty was perfect in my opinion.

C42 -

This mission was definitely a challenge with all the fire and poison but manageable if you take it slow. I think the fire turrets could use a bit of a dip in power and range but it does add to the "danger". Overall, loved it, the final room was absolutely awesome, perfect difficulty and the combination of fire + poison is a huge challenge.