I am suffering, especially on this crop protection mission. How the hell I'm supposed to protect the plants from ants when the ants will ignore all my dudes, frequently even when taunted, I have no idea.
Just finished this mission, it's a major pain in the butt. The first thing you need to decide is if you're going to try and get the monkey orb and the item on the same run or not, since that'll decide your team composition. I just managed to get both on one run so here's what I did.
Firstly, the Treasure Dango will leave on (I think) turn 3 so you'll definitely want Tilde, since her skill is perfect for boss/dango killing. Have her Store Power on turn 2 then unleash on turn 3. You may need to get a little lucky since the Dango can repeatedly proc Tenacity, but if Tilde has some damage boosts she may just keep attacking anyway, so you'll probably be okay. Her killing the dango is the easiest part (and frustrating when it doesn't happen, though fortunately you'll know by turn 3, and Tourin may be able to reach it after it teleports and take it out anyway, since it'll be at 1 HP).
Secondly, Tourin is very helpful here. He's not a strong unit but his boost to movement is very helpful here and his ability to max your gauge is almost necessary - with 4 units deployed there's no guarantee it'll be maxed by turn 3 for Tilde, but he takes care of that. He can cover fire too if there's no one he can kill, may come in handy.
Thirdly, for the last 2 spots I found 2 tanks to be necessary. A NOTE ON TAUNT:
The way taunt works, if a unit can attack the unit that taunted it, it will. However, if it can't reach the unit to attack it, then the AI seems to function as if it isn't taunted. The Antons only have 3 move (and can block each other's access to a tank by taking up an open side) so if they can't reach an open side to attack the taunter, they won't even move toward the them, they'll just attack whoever is closest (probably an Aloe). I used Senhime and Pitten as my tanks, though you could use Patton too instead of Sen. I think Pitten is better than Hubert here since his Taunt is a 3x3 square and Hubert's is just a plus symbol - that extra range will likely matter. Be very careful when using your taunts, since Sen/Patton have a huge un-targetable AOE range: if an Anton is next to Pitten and then gets taunted by another tank that it can't reach, it is effectively not taunted (and will likely go for an Aloe). Unfortunately, Sen/Patton's huge AOE is kinda necessary to reach the sprawled out Antons in the back.
And a final note, make sure your units (or at least tanks/Tilde) has a speed of at least 7; you can give them bugs to raise their speed if necessary. Antons have a speed of 6 and acting first to taunt them before they hit an Aloe can save your run. There's some variability to speed, but having 7 will at least put the odds in your favor and if you've got bugs to spare then higher is better. Always try to make sure the Antons will have a path to an open side of your tanks (check their turn order). Also, make sure you've got some good survivable gear on your tanks, especially good HP boosts (they'll be taking a lot of damage). This was why I used Sen over Patton, her extra Tenacity means she's very hard to take down (this ended up mattering for me).
I put Tourin and Tilde at the top, then Sen below them. Pitten was at about the third space up from the bottom. Pitten charged out and taunted the front 2 Antons (when they go for him they become closer to the front Aloes, who will have more HP since they're spared the early rush). As he's able he draws more Antons from the back row while inching forward (probably only 1 or 2 though). Tilde rushes out, hits an Anton (and won't kill unless she crits or gets to Act Again), then stores power and kills the Dango on turn 3. After that she's clearing out whatever Anton is untaunted or is closest to the lowest HP Aloe - whoever seems the biggest threat. Tourin tings people from a distance, uses his special on turn 2, and then Cover Fires or chips Antons as he can. Sen charges forward and taunts Antons, slowly drawing them back towards the front Aloes if she can move and stay in range (the back Aloes are likely raggedy at this point). It is better to have Sen's speed higher than Pitten's (likely 8 to his 7, though more is fine) so she doesn't fuck up his taunt with her own. Hopefully a counter is two is happening so Tilde/Tilde+Tourin can kill them with their own attacks.
And that's it. Charge forward, take out the dango, taunt the Antons, draw them back, whittle them down while they're focusing on your tanks. You may need to get lucky with Aloe Tenacity or a critical/act again but I can testify that this method will work. Took forever to figure out this lineup and this map... just sucks, but it is doable. Good luck.
(Doing this in 2 separate runs for the item and orb will likely be easier, since you can bring Rance/Rick/Someone with an AOE attack instead of Tilde - though that means you have to experience that hell twice. Just have them focus on Antons around the top tank with their AOE, make sure your tanks have open sides, and clean up as necessary. 7+ Speed and 2 tanks I think is the key)