Slaying a G rank White Fatalis solo ?

G rank white fatalis is impossible to beat solo at its 3rd return( continuous armor mode) even with Uca GS Raw+elemental =1800! in MHP2G.(Atk up large,unsheath atk crical,Dmg rec +1)
50 minutes,ESP, LG Barrel Bomb +, Felyne bombs is not enough to evict it. Neither does large barrel gun with full ammo inventory.

Actually it's possible to kill the guy solo (since I don't play multi), since I farmed the guy for quite awhile but got bored of it due to not receiving the materials I need for awhile. If it's the download one, do what admiredfob does in youtube it should work pretty well if done correctly. If it's the round one I just GS charge him to death on the first round with full diablo z and that diablo gs (forgot it's name), should put him into armor mode about 20-24 mins into the fight if done properly. On the 2nd and 3rd round I just use Uca/Uka GL and shell the hell out of him, though I use the skill gunnery master and sharpenning skill inc, I was able to kill him in the 3rd round with this trick, oh and no bombs too.

gem alchemy, allows for 22 bombs, 10 lbb+ 12 lbb
use favorite wep against him
armor mode bomb the shit outta him & you can also spam clust if you want
use favorite wep aftr armor mode
carve him and try to make fatalis Z