Thunderlord is the Exotic heavy Machine gun most augmented for crucible. Harrowed Quillim's Terminus is a 310+ raid weapon, and most people I know seem to underestimate a Thunderlord when they possess a Harrowed QT. What do you prefer, and the "I can't use my other exotics while Thunderlord is equipped" is redundant because of the ability to change you weapons with this cool thing called an inventory. But if you have inventory loading issues during any firefight such as I, and can't change 2 things in time for heavy, then so be it.