Would similar boost stack? Eg demon powder, demon drug and might pill?
I soled T.Kirin with dualblade. it's not easy but not too hard as long as you dun get greedy with damage. Go In, Whack a few time, Come out.
Get vitality mantle & Thunderproof mantle, use them alternately, learn his moveset and dodge it, eat whatever dmg and def boost you have.
E.g: Demon Powder, Demondrug, MegaDemon Drug, Might pill
Hardshell powder, Armorskin, MegaArmor Skin, Adamant pill
Not to forget, a must have in ur inventory, Powercharm, Powertalon, Armorcharm and Armortalon
Oh ya, if you can boost your thunder resistance to 20, anything more than that also useless.