Please use proxy clientlibs and include using etc./Clientlibs/
I put it under /etc/designs/app/clientlibs and check.but it is showing an error which is _elqQ is not defined.Eloqua.js is calling this Library.//img.en25.com/i/elqCfg.min.js.So that can we get eloqua js outside from main.html ? error is _elqQ is not defined.Note - in this case it is not under apps. so allowproxy:false is okay cas it is not under apps.
Please try following steps:
Hope it helps!