I'm thinking your looking on the wrong droid side :
They do not fail damage or speed with engineer ...
What prevent them to live is that they don't have dispel debuff and when a team survive the original onslaught from droid, they kill quickly the two key caracter from droid team : engineer and IG-88 that are so frail.
Glass droid event if you enhance their damage won't change the issue.
The OP intention is to change IG-88 so that it initial attack one shot all the ennemi team ...
Not very funny and it won't work on immune critic team at start of encounter like Siths or First Order...
As your fear is Zeta Darth Maul, your issue won't be change.
