What if I don't have Khravengger?
Don't play Last Rite.
Your damage will suffer, a LOT. Use
Sundered Prince or
Seeker of Dark Lung as a placeholder, but really, if you like playing Last Rite, get
Khravengger. It's a massive gap compared to any other weapon (as of 1.1).
Can I replace X with someone else?
Xaihi: Irreplaceable. Wherever there's a Cryo DPS, she will be there. Her buffs are just too strong for you to not use her.
Ardelia: Easily replaceable as rotations can feel a bit clunky due to the nature of Last Rite gameplay/rotations. Sustain is just for comfort and if you don't feel you need it, Ardelia value drops significantly.
Perlica: She's good, easy to play, won't accidentally consume your Cryo stacks and has zero SP cost. Recommended to use, but unlike Xaihi, she's replaceable.
Gilberta: While she's great for grouping enemies and applies a lot of Susceptibility on enemies, Gilberta can destroy your Cryo stacks with a bad rotation. Furthermore, Last Rite already applies Susceptibility, lowering a bit of Gilberta's value. This can get even worse if Tangtang is on the team, as she's another source of Susceptibility on enemies. Recommended over Ardelia.
Tangtang: If you have her signature (
Brigand's Calling), she's hard to replace. Otherwise she's just "fine". More Cryo Inflictions is good and can smooth your rotations a bit.
Si: Similar to Tangtang, Si fixes a lot of possible issues Last Rite can find during rotations, especially against mobile enemies. Her buffs aren't as great as
Xaihi or
Tangtang (with signature), but her unique skills can change how you approach some bosses/content, in a way no other Operator can. If you can make use of her kit, she's definitely a great teammate, but she's not mandatory or a massive increase for your Last Rite team.