Multipool site does indeed need some work. Tables are out of line, also have a config sample for X13 but there are no x13 links anywhere? is it just scrypt, scrypt-n, sha256 and x11?
By saying ''is it just'' your implying that these 4 algos are not enough? They are the most popular algos right now i don't think it would need more algos immediately.
Dev is doing a great job right now and will most likely get everything fixed.
If you saw the list of coins we're adding a couple are X13. They will be added soon, along with the rest of the list. The X13 will probably be added last though.