Variables for emails in M2

After migrating from Magento 1 to Magento 2, many variables stopped working – the list is not so long – but still, can someone suggest which correct variables are better to use that letters displayed correct values?

    {{var order.increment_id}}
    {{htmlescape var=$order.getCustomerName()}}
    {{var order.getBillingAddress().format('html')}}
    {{var payment_html}}
    {{depend order.getIsNotVirtual()}}   {{/depend}}
    {{var order.getShippingAddress().format('html')}}
    {{var order.getShippingDescription()}}
    {{layout handle="sales_email_order_items" order=$order}}
    {{var customer.name}}
    {{htmlescape var=$customer.name}}
    {{var customer.email}}
    {{var store.getFrontendName()}}: Credit for Order # {{var order.increment_id}}
    {{var order.billing_address.format('html')}}
    {{var store.getFrontendName()}}
    {{var membershipname}}
    {{var order.increment_id}} (placed on {{var order.getCreatedAtFormated('long')}}
    {{var logo_url}}
    {{var store_url}}
    {{var customer_name}}
    {{depend real_quote}}
    {{var recover_url}}
    {{var products}}
    {{var discount_amount}}
    {{var store_name}}
    {{var unsubscribe_url}}
    {{htmlescape var=$order.getCustomerName()}}
    {{htmlescape var=$first_name}}
    {{var reminder.insertProductsGrid()}}
    {{var reminder.coupon()}}
    {{depend reminder.needReview()}}
    {{var reminder.getDiscount()}}
    {{var reminder.unsubscribeLink()}}
    {{depend real_quote}}
    {{var coupon_days}}