Focus fire: no, unless you have have half a brain it's impossible to focus fire due to the cauterize perk, one kill and it's leaves all of those bullets useless. The only scenario were I found focus fire to work was if my group was using touch of malice (it melted the sunbreaker but still isn't a viable counter due to it taking up an exotic and replacing you primary.) You may say that snipers are a good counter, they should be but once again any Titan with half a brain will be skating around corners to prevent just that. Nightstalker: Any Titan with half a brain can destroy the tether before it has an effect. Or kill the nightstalker mid shot. Though I know that your deaf to the voice of reason due to the fact that after me writing a professional reply on why sunbreakers are too strong, you simply reply with what equates to 'git gud skrub' it just proves how much you're in denial.