Is it a bad Idea to try to build a Yanma with Speed Boost and Jolly nature to be a sweeper? it's attack/spec attack base stats aren't the best, but I'm trying to make one that can at least hit first, and hit hard, if not OHKO. Yanma has a few shitty weaknesses Like being x4 to Rock But it should be quick enough and if It can hit hard enough weaknesses shouldn't be a problem.

I plan on breeding until I get one with at least perfect Attack, and Speed IV's but if I can get more perfect I won't complain

I'm really just too lazy to spend the time looking for a 6IV Yanma

TL;DR: Should I try to make a fast, hard hitting Yanma or am I wasting my time