Your team seems slow. Scarf would be a good edition. I prefer scarftini as he lives longer. Plus many people think he is slower than he really is after the v-create drops and leave a poke in to die. I've killed so many donphans that way.
Roserade is everywhere and will beat donphan with minimal prediction. Replace galvantual with nidoking? You still have great coverage. Two status immunties. No SR weak either and he absorbs t-spikes for you.
And if its specs grass attacks you are looking for Rotom-C and shaymin are on the table. Rotom is spike immune, trick if you're into that, and voltswitch for momentum. In this meta I would say shaymin has the better typing compared to eggy and natural cure. Better overall stats too. 80% chance to hit on seed flare kinds sucks at times.
EDIT: Oh, you just wanted to fit in chandy. Uh, I dont know if you could just substitute a member. I guess a scarf/choice chandy in place of darm to not lose a powerful fire attack.
EDIT 2: After looking over your team I think three SR weak pokemon is too much in this meta. Having two bugs types is also a liability with the resurgence of fire pokes (especially since they are slower than the common scarf fire types). The only 4x weak bug/flyer that I feel can really hold up in UU is Yanmega who plays a similar role to Galvantula. If you made that switch and got rid of darm for a strong choiced physical attacker you'd have a physical/special hole punching core and scyther can bat cleanup? Just my .02c (note, I'm not the greatest team rater)
Roserade is everywhere and will beat donphan with minimal prediction. Replace galvantual with nidoking? You still have great coverage. Two status immunties. No SR weak either and he absorbs t-spikes for you.
And if its specs grass attacks you are looking for Rotom-C and shaymin are on the table. Rotom is spike immune, trick if you're into that, and voltswitch for momentum. In this meta I would say shaymin has the better typing compared to eggy and natural cure. Better overall stats too. 80% chance to hit on seed flare kinds sucks at times.
EDIT: Oh, you just wanted to fit in chandy. Uh, I dont know if you could just substitute a member. I guess a scarf/choice chandy in place of darm to not lose a powerful fire attack.
EDIT 2: After looking over your team I think three SR weak pokemon is too much in this meta. Having two bugs types is also a liability with the resurgence of fire pokes (especially since they are slower than the common scarf fire types). The only 4x weak bug/flyer that I feel can really hold up in UU is Yanmega who plays a similar role to Galvantula. If you made that switch and got rid of darm for a strong choiced physical attacker you'd have a physical/special hole punching core and scyther can bat cleanup? Just my .02c (note, I'm not the greatest team rater)