For solo, I found Cucu to be a struggle. Finding that he loves rushing you when he has it ult makes it more difficult since you can't outheal his damage with both forms, and how youre defenseless alone.
Anti-heal. Can you get anymore to the point?
You need to make sure you predict and time your ult right when Awilix uses hers.
Could and will burn your ult. Make sure to kiss and use your ult on someone without beads or with their beads down.
You WILL need to participate in team battles! Your healing and support abilities is most likely needed during a team battle! Always keep everyone healed up, shut down enemies from trying to kill your teammates with your Kiss, and make sure to use your ult accordingly!