It is NOT easier on a red gunlancer because u need to head attack and u got no way to guarantee a head attack unless the boss is already in a mech since ur taunts dont work on legion bosses. Plus u most likely have to eat a mech to do the head attack dmg coz 80-90% of all attacks hit the front.
i just finished leveling my latest SH alt to t3 1340… reading this thread makes me kinda regret not making a gunlancer alt insted 
GL and SH both make excellent alts… cheap and effective. You won’t regret having them both eventually!
There is a video on an 1482 zerk solo’ing hard valtan
This guy is 1580…
yes that is how you do it you pop shield and you pop your whole combo that take less than 2 sec your supose to keep your shield for that
you’ll be fine. so far people only regret soulfist
I’ve watched videos of DB, SH, and even squishy Reaper doing solo Valtan carry in KR. If you’re overgeared it’s possible.