I tried to use direct albumin (egg white powder). This works nic and this is powder - it is by default pasteurized. Only issue is that double strain is important and it may be a bit hard to transform powder to liquid state, so longer shake is preferable.

For me it was unbalanced. Yeah, there is less bitterness from campari in there, but everything else is more like separate in separation. Either agave syrup should be changed or something else is needed.

Nice refreshing, slightly acidic drink. If you want sour cocktail with bubbles and don't want too much of dry prosecco taste, this is good variant.

Nice longdrink. It makes Jagermeister specific taste more smooth and pretty sweet.