"Tribunal decided to overrule the objection of respondents"
Bit by bit, step by step you have gained.
You have obtained enough number of citations, facts, records and till 7th May you have sufficient time to prepare.
Do your homework, and give your best during the oral argument. God is with you.
During the formentive years lawyers are trained:
--To bang the law, if you are strong on law.
--To bang the facts, if you are strong on facts.
--To bang the desk, if you are weak on both.
Lawyer's job is to defend his client, and he shall do it with all his might. A lawyer would know what is in the case when file and records and facts are handed over to him, and accordingly the lawyer shall formulate his strategy. The company lawyer if allowed in the court shall do his best in the court or if not allowed in the court shall do his best to provide back up support.
Your strategy should be to prepare your case, arguments, and arrange the facts in such a manner that court is not able to ignore these.
From your posts it is felt that you have enough material to present to the court.
Your ability to convince the court shall matter a lot now. It shall be appropriate to consult an experienced, seasoned, intelligent service lawyer, labor consultant before you finalize your arguments. It is important to have the feel of next move of the opposite party and to formulate an airtight/watertight strategy. It is like a game of chess. The one who can anticipate next move of the opponent, precisely, wins the game