Giving 2 limiters makes for strange comparisons. We will give one limiter per type, or no limiters, on a given tasks challenge.
Brawl 3 and 4 had similar patterns in task creation. I should know, as I set these patterns before creating a majority of the tasks.
The boss does one task of each type. The challenge is in the variety, not knowing what to expect, and in having to do this and manage a team.
The artist varies between mediums and styles. The challenge is in attempting various different types of art and using new means of creation, and meant to not exclude artists who prefer other mediums to digital art. (The first two brawls were heavily dominated by this medium). Within these contrictions there is usually a thematic to connect the tasks for comparison and to make them elements related.
Card and Deck makes alternate between thematic rounds and strict challenges. The challenge here is to both test creativity within a given area while still making something balanced for a card and functional for a deck, and to overcome difficult design challenges for deck and card making. These may seem comparatively easier than the other tasks because elements is automatically ingrained in them, and not needing the additional thematic justification.
Forum Expert's have to make suggestions to improve the forums in various ways, which is challenging in a stagnant community. Their rounds don't have a pattern, as they are the hardest to create unique challenges for.
Off topicker has to deal with six different off topic subforums. The challenge is, similar to the boss, the variety and not knowing what to expect. While the creations are almost always written, they are very varied in the type of knowledge that you need.
Writers have to alternate between form and story, and are most comparable to artists in that regard. Form matches style, in that it has a specific area of restrictions (such as haiku to cubism, or comicbook to baroque). Neither require mastery, just an understanding of the form and an attempt. Then, writers have a story, which is more open in what can be done as opposed to the varying mediums for artist. They also have to be linked to elements in some way atop these restrictions.
All in all, artist tasks may be slightly more restrictive, but I don't think these restrictions are that much more difficult compared to the other tasks. If this is a significant problem, well, the lack of any interest in artist roles is a good sign they might not be around for brawl #5.