Zkigz seems to a vastly misused, and as a result, widely underrated little guy. Being at guyscore 12, that places it among other powerhouses towards the later game of guy teams, often needing to push forward the game plan a great deal, or be flexible enough or cover a weakness well enough to be worth keeping on call.
As is a common mistake, many players tried to build around Zkigz in mischief, prankery, or trouble-causing teams. There, it does, once it gets out mingling with other little guys, fill its role as a late game mischief maker with its magic, but I believe that there are more efficient little guys for the role.
No, where Zkigz would really shine, I think, is at the head of a Villainous strategy! With underlings and everything! When people go looking for a Villain to head such a team, they look for dark, serious, brooding, which is rough to find, but you can if you look hard enough. Then, of course, once you have a scary boss, you're stuck looking for a WHOLE TEAM of scary synergistic underlings. That line of thought leads to a powerful, but stagnant and predictable composition.
Zkigz is among a class of guys who I believe would be perfectly suited to lead a lighter-hearted varietal of the Villainy team, that would find more support among the wider guy pool. Reinvigorating the old hat villain comps would do wonders for the meta, giving the hero comps something to do as well, as they've died down since their main "prey" has gone niche.
Overall, I rate Zkigz a V+, for achievements in villainy. PLUS, also still being pretty good in mischief teams, and even a few times in pure mage teams, if it felt nice.