Absolute strategy that works for all: upgrade maximum HP to lvl.5 so you won't need the healing guardian any more, use only the last guardian (purple pig). create 3-4 of it before upgrading (quantity beats quality), apply statics 4, stay as close to boss as possible --> win all challenges.
Spread this well: 1. Only with the "Gentleman" can you get the full set of Protectomon and Jones tools. 2. Choose a hero based on its basic unit, because element and advanced unit can be changed.