Grenade Boarding Tech In Mythic Mode:

you throw a Plasma Grenade or a Fragmentation Grenade on him a split second before you board his throne. Picture it like this, your throwing arm penetrating his force field before you throw the grenades, with this objective the grenades will land or stay inside his force field. Therefore it is important that you throw the grenades inside his force field before you are unable to do so when you board.

Remember that our Master Chief cannot throw or use his weapons when he has actually boarded the throne. Adversely if you throw them too early they will not stick or stay inside the force field. Or as in the fragmentation grenades case they’ll simply rebound off his force field, thus musing the already contempt Prophet of Regret. At other times, if you are unlucky the plasma grenades will also bounce, though feebly off his force field and may end up adhering to you instead, a big no-no to avoid. So you MUST throw the grenades a split second before you latch onto his throne and not a moment too soon.

If done correctly the Plasma/Fragmentation Grenades will drop inside his force field and not fall off. The resulting explosion will then knock him hard, so for added effectiveness commence punching him straight afterwards or before the explosion (you’ll only land in two or three punches, as shortly afterwards he’ll teleport in a fragile panic).

Don’t worry about getting killed or damaged by the plasma
grenade since the explosion occurs inside of his force field. It will not harm our Master Chief. Just be sure to throw the grenade before you press and hold on to the ‘X’ button with which to board his throne. If he is at a higher elevation than you are at, then all you need to do is press the jump button, throw the grenade and then quickly board him. This is simply a brilliant tactic on Bungie’s forward thinking.

You will need to perform the Grenade Boarding Throw Technique about five times to finish him off entirely or maybe more if your grenades do not fall inside his force field. Use your EARS to listen in and to home in on the location he’ll spawn to next. It’ll guarantee and reward your efforts with a far better success rate. Your radar is your best friend in these given circumstances, as the battles to follow are hectic to outwit.

You can also drop the grenades inside his force field without boarding his throne. Run up very close to The Prophet of Regret’s throne and throw your grenades at point blank. If done successfully the grenades will drop inside his force field. Please note that this method will not yield the desired effects on every attempt as it is at times harder to penetrate his force field and to judge how close you are to the Prophet of Regret without boarding him. And amidst all the battle commotion and pandemonium it is especially harder to pull off.

If at times you find that Regret is a bit too far out of reach for you to board, and you have the right weapon combination. What you can to do is you can jump toward him whilst quickly aligning your Energy Sword’s reticle on him so that it turns red, and thus performing the sword lunge. At the precise moment you strike Regret with the lunge – he’ll have to scream for this trick to work –that’s when you throw the grenade and latch on immediately. Both the explosion and the Energy Sword will deal him some heavy damage. And since you’re on a roll here you might as well punch him for a good measure while you’re at it.

You won’t be able to perform the Grenade Boarding Throw
Technique on him if the sword lunge goes ill. See, if you lunge at his throne you’ll hear a clunk noise, and rebound backwards or sideways instead. That’s a sign when the trick goes astray and you’ll be wasting your grenades. It has to make full contact with Regret himself as he’ll scream to verify that your trick is in working order. This is when you immediately throw the grenades and then board his throne. So the short end of it is; you lunge and he screams, you then throw the grenades and board him immediately. It may take a few tries to get used to this fancy sword lunge trick, but it’s a very satisfying technique to pull off.

Don’t forget to PATIENTLY take out the re-spawning Honour
Guards as well as the Grunts who’ll make certain of your efforts being anything but a smooth success. Take heed though, for the Honour Guards are now on par in strength with the Ultra Elites from the Legendary difficulty setting, on this Mythic Skull difficulty. So a simple stuck plasma grenade will not finish them off – unlike the Legendary difficulty, whereby the Honour Guards were easily eliminated with just a stuck plasma grenade. So do keep that in mind when taking them on.

Proceed to take the enemy hordes out before engaging the Prophet of Regret. You’ll fare a far better chance this way. Reserve a keen sense of awareness and alertness for the dual wielding Plasma Rifle Honour Guards as they’ll finish you off in a second. The best way of dealing with these Honour Guards is to run back up the side ramps and look out for them on the top central level. Track their advancement from this vantage point. Use the walls and the slopes of the ramps as your cover. They cannot shoot you if you’re situated above a slope and they down below. If they get a hit in, just keep retrieving, or toss a grenade their way to stop their advancement. The Energy Sword wielding Honour Guards however will advance regardless. So keep all those in mind, they may come in handy.

Check your radar as well if you cannot see them from this central elevated vantage point. The radar does not show stationary foes, only ones that are mobile. So be alert as sometimes they’ll stay in hiding and ambush you instead. Their preferred method of attack is to overwhelm and to surround you. So if you see two from the central vantage point, but only one is attacking you – then what that entails to is that the other has gone the other way to intercept you. So pay attention to the number of enemies in the vicinity.