follows.js

// Mod Follows
Follows = new Mongo.Collection("follows");

Follows.allow({
    insert: function(userId, doc) {
        return userId;
    },
    update: function(userId, doc) {
        return false;
    },
    remove: function(userId, doc) {
        return (userId && doc.owner === userId);
    }
});

Schemas.Follows = new SimpleSchema({
    owner: {
        type: String,
        autoValue: function() {
            return this.userId;
        }
    },
    entity: {
        type: Number,
        index: 1
    },
    uid: {
        type: String
    },
    createdAt: {
        type: Date,
        defaultValue: new Date()
    }
});

Follows.attachSchema(Schemas.Follows);

pub.js

// Follow count of current mod
Meteor.publish('allFollowMod', function(mod) {
    return Follows.find({uid: mod});
});

router.js

// Display single mod
Router.route('/mod/:id', function() {
    this.render('modSingle');
}, {
    name: 'modSingle',
    waitOn: function() {
        var user = Meteor.userId();
        var mod = this.params.id;
        return [
            Subs.subscribe('singleMod', mod),
            Subs.subscribe('modOwner', mod),
            Subs.subscribe('currentModUser', user, mod),
            Subs.subscribe('currentFollowMod', user, mod),
            Subs.subscribe('allFollowMod', mod), // This one is causing the lockup.
            Subs.subscribe('modScreens', mod),
            Subs.subscribe('screenFiles'),
            Subs.subscribe('modComments', mod),
            Subs.subscribe('usernameEmail')
        ];
    }
});