0632 Durant

Bug Bite is the preferred fast move due to its greater damage output and more meaningful coverage. 

X-Scissor costs the least amount of energy which lets it bait shields, and takes advantage of STAB. Stone Edge is valuable for its wide coverage against common typings. Iron Head isn't as useful despite gaining STAB. 

Durant resembles that of Forretress, with identical typing and primary use of Bug Bite. Unfortunately a higher Attack stat reduces Durant's overall bulk, and while its access to Stone Edge is better than Forretress's Rock Tomb, not having the power and coverage of Earthquake limits the amount of threat Durant can pose against the meta. Interestingly enough, Durant can actually beat Forretress in even shielding scenarios with successful shield baiting due to faster access to its charge moves. 

Having the huge issue of losing badly to both Giratina and Registeel, Durant does win against Umbreon and Psychic-types. Access to Stone Edge is also valuable, in particular against Lapras, Lugia, and Togekiss. That's not enough to make the little ant truly shine, though.

With a max CP of 2659 Durant lacks sufficient stats to compete well in Master League. Its plethora of resistances still enable wins in some matchups where Durant has a typing advantage, isn't enough to deal with various legendary Pokemon who boast significantly higher stats.