These seem to be very poor options unfortunately.
ET J is better than AI J - soft and hard. However ADD is a complete mess. AI has the advantage of flying “direct” which is always better. So none of the options look great right now.
You should call UA and ask about SQ availability (never shows up online) via LAX or SFO. LH is also a better option, however they generally release award seats to partners about 2 weeks prior. As would be UA with the real Polaris (though I think UA is flying Polaris into DEL now).
You could also check for flights into BOM and then fly to DEL from there. More painful but you might get better *A carriers.