Unfortunately on the X3 you are limited to the slots.

There is a delay that has a mod on it, so it's sorta 2 for 1.

you can be clever and wire tone1 into tone2 ....

but the x3's effects chain is static and you cannot have multiples of the same type effects.

guitar to guitar

tone 1 to left 1/4"

cable left 1/4" to tone2 aux in (set that as the input to tone2)

tone 2 to right 1/4" to amp.

you can then use 2 of everything...  of course it'd be extra management for pre/post placement....

anyway... not recommending... just saying...