{% attackRoll = {{$attackerMods} + 2d6} %}
{% defenseRoll = {{$defenderMods} + 2d6} %}
Defender's roll (with mods): {$defenseRoll}
Attacker's roll (with mods): {$attackRoll}
Result:
{% rollTotal = {16 + {$attackRoll} - {$defenseRoll}} %}
Roll on "Boarding Action Lookup" (dice="{$rollTotal}")