I cannot find any explanation nor list regarding ‘levels’ of elixirs. The Alchemy ability at novice level enables characters to make “one dose of a novice elixir” for instance ...
I assume that ‘weak’, ‘moderate’ and ‘strong’ correspond to novice, adept and master. I’m with you so far. But what about the rest of the elixirs without such degrees in parenthesis (Ghost Candle for instance). Are they all weak?
My take is that those elixirs can't be made with Alchemy. They are very special and require other abilities (like the choking spores) to learn to manufacture, or are even there to use at your will in your campaign.