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Since the Lizardfolk doesn't want to, let's go over the roles:
Bachelor. Healing > infection check. Save the ultimate ability for later.
Burakh. He's just chilling, so he doesn't have any legal targets.
Clara. Lay on Hands is better than Hypnotic Word, which is better to use later when it's roughly clear whose statuses will reveal the setup. But hypnosis is also an option.
Block. Isolation is better on a random target early on. The only reason to use Protect is if isolation might prevent a check, which we want to avoid. Just because we'll suffer if the target is a Mafia member and is also isolated.
Don't shoot, Lilich. Just do a check.
Kaina - is it worth going into isolation right away? Probably yes, even considering that it might interfere with the check. Although, waiting until the second night is also fine. After all, the ultimate ability is supposed to be used on the fifth night. So, in any case, isolation will have to be skipped on the fifth night.
It's hard to advise Olgin. However, the resources allow for five sends from himself.
Here, we need to test whether the send will be displayed to the target as a translation. If not, sending a check to the Mafia could have consequences for Olgin himself. However, it's worth saving self-healing for later nights (3 and later). So, maybe chilling is not the worst option.
Saburov's check, if it's legal as described earlier. If not, a check and a block are equally possible, with a block being better in the later stages.