This is my TDR-5S build. I is a fun build. I seem to do well in it. This a close range brawler. I find the Tbolt to be a tough mech. This one goes as fast as they can. Has good DPS of 4.62 and a alpha of 35.59. I think those are good numbers. This is just my fun mech. I always use LBx and LPLs or MPLs on my fun mechs.
Stock engine variant: Does have some great potential, While I usually run extra speed with XL engine on my Thunderbolts, I think that it's completely justified to run this with an STD engine, as the right side with the LPL is still pretty powerful when you lose the left (which most people probably target). If the STD260 is too slow (it could be with the torso twist), remove some DHS. 2DHS less gives you a STD275.