Are they all awakened? If so and SW is sig level 35 or above already then definitely her. Otherwise I'd do Gully. Reverse healing has suddenly become increasingly handy.
Most might say Magik. She's a top boss for AW and can carry her own on any attack phase or quest, but for pure attacking she's not as good as either of the other two.
They are all awakened, although sw is only level 5 sig, so she’s not that much help, everyone goes for magik but I do love guilly
If you have either vision or another top power control champion at r4 or 5 then definitely go with gully in that case. At sig level 5 SW has maybe 6% chance to activate her chaos magic, assuming you have greater precision max ranked. Doesn't get better until she hits about 25, and even then it's unpredictable and not very reliable.
If you don't have a strong power control champion you might want to do Magik just for that purpose. Everyone needs at least 1 for more difficult bosses.
I'm a fan of Guillie. Always have been. Witch is good, if the RNG is right. I suppose it's all preference. My suggestion is Guillotine. I'm at Sig 99. She's great.
Comments
Most might say Magik. She's a top boss for AW and can carry her own on any attack phase or quest, but for pure attacking she's not as good as either of the other two.
If you have either vision or another top power control champion at r4 or 5 then definitely go with gully in that case. At sig level 5 SW has maybe 6% chance to activate her chaos magic, assuming you have greater precision max ranked. Doesn't get better until she hits about 25, and even then it's unpredictable and not very reliable.
If you don't have a strong power control champion you might want to do Magik just for that purpose. Everyone needs at least 1 for more difficult bosses.