Agilex 3 ESD Protection

What is the ESD rating for A3CZ100BM16AE7S I/O pins (and HSIO true differential pins if they are different)? 

Do they require external ESD protection, and if so, are there any guidelines on selection of an appropriate device? 

I intend to use some of the true differential receiver/transmitters for LVDS comms on a 1.3V bank, and found the information shown below about maximum ratings and maximum overshoots implying the maximum voltage on those pins can't exceed ~1.75V, but finding an ESD diode which doesn't breakdown at 1.3V, and clamps before 1.75V is an impossible task, so what is an acceptable clamping voltage?