help pick a champ

so im nearing 4800 ip and i was wondering on whether i should get sarner or fizz. Ive played fizz before and i appreciate his skill and damage. I like high mobility champs like my main ezreal. But i also wanted a good jungler that no one really plays. Skarner seems fun with a pull and ik he can deal damage. The junglers i work with now are rammus and nunu as well as amumu. Amumu is fun and i love massacring people as rammus but nunu isnt as fun. Mainly should i go with skarner or fizz.