When the mod launched, I started it up on Legendary, and reading through the discussions, I feel like there is some wisdom that should be imparted, not out of a sense of superiority, but for pooling together communal knowledge, so I will drop in some tips I found by playing and spending some checkpoints testing:

Shield Jackals are difficult if you play in either a strafe oriented or cover oriented style against the TNT spamming Minecrafters, in order to properly defeat them, usage of some weapons is recommended, namely, the bitcrushed plasma rifle, A Salt Rifle, blunderbuss, flamethrower, quad laser, toolguns of the ignite, black hole (use at long range) pain, and random variety (defer to the D20 tip coming up), and damaging minecraft splash potions, plasma grenades are inconsistent and require distance but can help and if all else fails, you can still just BARELY shoot the hand to damage them. To safely spin kick them in Solo, start the kick before they enter range as you can still be killed during the animation, and in Co-Op, flanking should be employed to trivialize them when possible.

When using D20 grenades, try to have some distance and potentially have a door between yourself and the grenade should something happen, such as Half Life Orbs, Splash Potion spam or the various explosive results, and do NOT throw it in the way of progression, lest buffboi or the flappy banshee squadron block progression and force a revert in say...the Maw.

Focus down hitscanners! Halo CE tried to avoid hitscan enemies, and Sentinels/AR equipped flood were only threatening in numbers or if you were already overwhelmed, even on legendary, CHA does not share this design formula, sniper jackals, the flavors of sentinel, and beam rifle jackals are more lethal than most other enemies as they can easily take out chunks of your shields or even health rapidly.

Remember even the hoglet 'grenade' has the lethal CE splatter mechanics! It makes it a useful weapon but in cramped corridors can kill you as well, so...yeah.

And for my last two tips....I will share TWO potion effects, but only the color for one of them and a general tip, currently the golden potion is an overshield powerup, and there is another potion out there that is a full resupply, health, grenades, and a full ammo restock on all weapons (not potions though).

And find a comfortable, common weapon you enjoy and can fall back on, for me, it was the Bitcrushed Plasma Rifle, one of my friends hates it.

Should these tips prove helpful, that is good, should they not, meh, if I got something wrong? Well color me shocked like an RGB rifle but hey, I take corrections.

TEXT WALL OVER!