I'm thinking of a "grappler" type of Knight with two Thunderstrike Gauntlets, two meltas (the Knight doesn't have a shield thing on the shoulder) and maybe a rocket pod. The idea is that he'd punch shit good but the role he excels at is attacking other Knights/walkers by literally ripping them apart with the gauntlets and then blasting away at the open circuits and machinery with the dual metals. Basically what happens if you combine a Knight Gallant and a Dwarf Slayer from Warhammer Fantasy with some good old fashioned Pacific Rim chucked in too.