Who should i use as a support for her? Should i go merlin and waver or someone else?
Buster and crit supports work good on her
Merlin,waver,Hans,Helena,Nightingale,leonidas work good with her you can also pair Altera + Support + DPS for most content.
She can also use someone Like David,Tristan or Mash for protection in harder fights
If you are looking to use class advantage consider Nero Bride. She increases attack, NP gain and heals. Her single target NP complements Altera's AoE. You may not need Waver or Merlin. This leaves a slot open for Mash on defense or a damage dealer for the non - Lancer foes.
