Sigil Map no Chance to win

How should I win this Battle - it is impossible - the opponents oneshoot my Dragons - no matter what I do - Mass Leech first - or Mass Blessing first - no chance for me

Team order: Oyar, Oi'ra, Aphrodite
Use Mass bless with Oyar, then Oira mass leech targeting Mineral, then blast with Aphrodite targeting Mineral.

That is not working. I did Mass Blessing with Oyar, then Planet oneshoots Oira (btw. Oira has Enchantment Mirror) - then I got only one Shot with Aphrodite - then she and Oyar are taken out from the next 2 opponents.
My other dragons I could use are Hypnos with Rare Acceptance/Evasion, Hathor with Rare Acceptance/Chi, Nezha with Rare Acceptance/Wonder. 
They are all lvl. 95/8 Stars.

You forgot to mention one thing...did Planet hit with burnout ?
Because it's the only way for him to oneshot a dragon with 4T hp when he has 2T atk.

Sorry I messed it up a bit. I had Aphrodite in first Place, she did Mass Blessing. Then Planet oneshot Oi ra (3rd Position) with Poison. 
Then Oyar did Mass Leech - dont remember on which opponent. But the next two strikes from the oppenents wiped me out.

Why Aphrodite with mass blessing when Oyar is the one with Wonder sigil?

Aphrodite is not the blesser in your current setup, Oyar should be the one.
With Aphrodite as the blesser your team has around 1.7T hp after mass bless, with Oyar your team would have above 4T hp after mass bless.
Because you use Aphrodite as the blesser, Planet could oneshot any members of your team with any elements.
But the problem here is that if Planet use burnout it'll oneshot any dragons as long as Planet is above 25% hp.

So maybe the best bet with your current team is to do.
Team order: Oyar, Oi'ra, Aphrodite
Use Mass bless with Oyar, then Oira enchantment mirror targeting Planet, then blast with Aphrodite targeting Planet.
It could be enough so he can't one shot dragons.
The problem being that he can ruin a part of the strategy if he uses burnout on your team.

Should I use Nezha with Rare Wonder/Acceptance at first Place with Mass Blessing, second Place Oyar with Mass Leech on Planet, 3rd Place Aphrodite with Fire ?
@Hakaru Thank you it worked with your suggested Team Order. But I was lucky, Planet missed his Shot, and the second Opponent as well

after reading this discussion I don't feel so bad that I can't get very far on the map. My dragons are at lvl 76 with 6 stars! So I'm way out of you all's league! Every time I'm in there all the dragons are too far above me to even have half a chance! Thanks for the info! Think I'll just skip that part of the game! It's no fun if you have no chance to advance.

The highest level Divine should do mass blessing with wonder. The level of the opponents is determined here by Aphrodite. The other two dragons should also go to level 95.