It is just the way I see and you still didn't give me a reason for then why he needed it.
Once in a fight with Silver Surfer Blasting him constantly Beta Ray Bills attacks and Gladiator and last one attacked him from behind hurra that hurt him but I believe what he did against her hurt even more.
Again then why he hell would he need it if it didn't give some kind of advantage I say again I speculate that it possibly increased his powerlevels, and he sendt in the 6 others Morg, Terrax, Gladiator, Beta Ray Bill, Silver Surfer and Ganymede that was when he stealed it, now if he was looking for a fight and a test then why didn't he just confront him head on ??? fairly simple answear he didn't have the power ore didn't what to take the risk and then decided to get some help in form of the funny little orb.
If this is your opinion, that's fine. I'm just letting you know that nowhere is it stated by him, Tyrant, or the writer that the orb increased his power in any way.
You can also take the other side of the argument by saying why did Thanos even fight him in the first place if he could just teleport away? He didn't have to confront Tyrant. He could have just taken the orb, told Tyrant he had it, and disappeared. But he chose to stand there and fight, and he chose to do it without Ganymede's help.