Have shatter skills that turn illusions into other things while negating it’s shatter affects like damage or condition applying. Shatters could turn an illusion into things like five menacing little menacing fly-like things that will engage an enemy (with fifteen if three illusions are shattered) or reflecting blockades or any number of useful things…
Another thing, make ranger pets less necessary by enhancing their strength or skills somehow if they played without their pets. Pets would be more of a tank assisted type of gameplay if they chose to use their pets. Or make them more gameplay useful when they are used.