What's your build? I'm using the full Uragaan set, with a Guard Level 2 charm and the Nerg or Rath Gulance.
With the Uragaan 3-piece bonus for blocking unblockables, Partbreaker rank 3, and rank 5 Guard, i basically don't have to move. For anyone. Ever. If I don't want to.
Dodogama for the Artilltery, Uragaan for part breaking. Might get an exploit weakness charm/piece. Haven't bothered with guard(yet), as I haven't killed too many endgame elders yet.
I think i'm able to offer you guys some insight on the GL.
My build is (and i think something like this is probably the best)
Weapons is Eradication Flame (High base raw, not negative crit) and you should do the wide sweep infinite.
Dragonking eyepatch
Dober mail B
Nergigante Vambraces A
Neegicante Coil B
Nergigante greaves A
Exploiter charm 1
Decorations are:
Challenger Jewel
Sheath jewel (x3)
Attack Jewel
Note that if i had the decorations i wanted i'd have
Challenger Jewel (x2)
Attack Jewel (x2)
Weakness exploit jewel
That would let me replace my amulet with the crit charm (for more crit damage)
In all my skills are
Nergi Hunger (set bonus)
Attack Boost lv6
Agitator lv4
Weakness exploit lv3
Quick sheath lv3
Maximum Might lv
And for the perf decorations it'd be
Attack Boost lv7
Agitator lv5
Weakness exploit lv3
Critical Boost (dunno what level it'd be)
Maximum might lv1
(No quick sheathe so commit to blocking)
I think guard is unecessary, knockback or stamina drain is not a problem even against most 1shot moves (even then you should just not get hit by those at all)
Artillery is only good (IMO) if you're using the the Royal burst gunlance (Only lv 4 shelling normal gl), with Capacity boost and spamming the Burst fire infinite.
Shelling outside of hitting bounce spots is just bad, it can't scale well at all, does less damage than just doing a guard poke and it destroys your weapon's sharpness.
And Wyvern's fire horrible too despite looking amazing so the benefit provided by artillery is wasted on it.
I will say tho that since shelling is so bad to scale you can afford to go all in the defensive aspects of a build so that's a plus.
Sorry for the wall of text and remember this is only my opinion from my tests and it shouldn't get in the way of you playing the way that you want to with the items you want to.