Haha beat the Trials on my second try and the final boss on my first. Just finished getting the Platinum. Doesn't feel as satisfying as the other GOW Platinum trophies. It was too easy IMO.
My hard playthrough was easier than my normal run. I maxed out my weapons 3 chapters before i reached the Trials. Still a great game. Solid 8/10.
Trials require a lot of patience and some skill. If you don't master Uroborus, Orkos, and blocking then sorry, but you're fucked. Here are my tips, pretty much the same as others.
Wave 1- Uroborus, Orkos, and block. Rinse and repeat till Medusae's are dead. If you feel lucky than add a couple of Square combos. Make sure to all always grapple them when red. They refill your magic. Now for the lighting assholes use ALL your magic. Don't bother blocking. Just Uroborus, Orkos, and magic. grapple is a must, it's easier, and you refill your magic. If you have at least a quarter of your health then congrats you made it.
Wave 2- Uroborus, Orkos, and block. Rinse and repeat till the avatar chicks turn red. DON'T UNBLOCK OR USE ANY COMBOS. Yeah it's cheesy, but these fuckers don't play. Grapple them when red and boom you should have at least40-75% of health. Lighting rock dude. Uroborus, Orkos, Square combos and magic if you have. Just throw the birds out the arena to make it easier. If done right you should go untouched for the rest of the Trials.
Wave 3- Uroborus, Orkos, and block. Just block the entire time. Black Kratos will do all the work. If he charges you win the QTE and give a short Square combo. He'll turn red within 30 seconds. Grapple to get the extra health. You should now be somewhere between 60-90% of health if done right.
Final Wave- Uroborus, Orkos, and block. That's it really. If you have magic go ahead and use it. If you grapple them your magic refills. So killing the rest is a piece of cake. But if you want to play it safe then just let Black Kratos do it all the work. If you're low on health DON'T CHANCE IT. Just let him do everything.
I finished with 1 magic bar and 70% health. Went untouched from wave 2-4. If you Platinumed every GOW game this isn't really a challenge. Bad design? Not imo, but the camera is awful especially in wave 2.