Some great advice from Omnichron above.
WoC are my in-house opponents/alternative army so I can break down what works for me against them.
Know your enemy
WoC will rumble forward and try and crush you in h-t-h, backed by powerful magic, monsters & heroes. Expensive high armour, high stat troops supported by solid lightly armoured inexpensive troops. Little to no shooting save warmachines.
Strengths:
Marauders - decent, hard hitting combat troops, v cheap.
Dogs - fast irritation units
Mounted Marauders - as with Marauders but can shoot.
Warriors/Chosen - armoured h-t-h killing machines
Knights - fast armoured h-t-h killing machines
Monsters - various
Warmachines - force multipliers/heavy fire and CC ability
Weaknesses:
Light troop weaknesses - T3, low armour, I4 core vs I5 core.
Heavy troop weaknesses - high points cost, limited mobility (Warriors/Chosen) vs Elves, armour vs Lore of Metal, I5 elite vs I6 elite.
Monsters - in most cases, low I.
Warmachines - not a lot!
Strategy
Shooting/magic attrition as they trundle implacably towards you, redirect/outmanoeuvre once they try and engage. Aim to split their battle lines by presenting multiple targets, stretching play across the breadth and depth of the board; attempt to isolate their units piecemeal and then break them down with combined assaults.
Tactics
Using the rock-paper-scissors approach to aim for favourable match ups:
Vs Light troops:
RXB shooting, magic missiles, HB Corsairs
Higher initiative multi-attack close combat (SSS Corsairs/WE/Spear formation); aim to wipe out as many of them before they can attack as possible.
Vs Warriors/Chosen
RBT fire.
Stubborn unit in the front, elite in the side (obviously the more heavy troops you can simultaneously combine against them the better).
Magic buffing/debuffing or templates.
Warded COB-backed ASF Hag Execs (I5) are a good anvil, without them any unit that you think will not run away first turn (SoD spears for example). CoK, Black Guard or Witches in the side (I6). CoK charge S6 and natural S4/mount attacks is great, AP standard BG (S4, 2A) and AP standard Witches (S3 poison, frenzy), probably in that order of preference.
Chariots (I6) at 100 pts are a useful flanking tool as well.
Also feel free to just speedbump, redirect and run away from Chosen Star type units.
Vs Knights:
RBT/Magic.
Expensive so our Knights plus helpers (Harpies/Dark Riders).
Vs Monsters:
Witches (poison), Executioners, BG, Magic buffed shooting/debuffed monster, Hydra, etc.
vs Enemy Heroes:
Magic Snipe/Hero Hunt/Assassinate the Sorcs and/or break with CR.
Tie up enemy combat characters with champions and try and win on CR and/or tool up our combat characters as suggested above.
vs Warmachines:
Ignore till the end of the game or try and take out with Shades and Manbane RS Assassin/Flying Combat Character.
Druchii Rare:
"Clash of the Titans" Hydras - gives your opponent a headache due to its power, speed, regen and breath weapon but WoC are well equipped to take it out in h-t-h.
and/or
RBT - not generally recommended on D.net but always
at least get their points back for me vs WoC. i.e. 200 pts 2 RBT = 12 S4 AP shots per turn. Warriors/Chosen/Knights do not like. Moreover your opponent has to consider aiming resources at them thus giving you another factor in stretching his battelines.
Druchii Magic Strategy:
I tend to either go for:
Magic Offense List (i.e. 1+ L4, Sac dag, FF, ToF, PoD, etc) - mutually assured destruction; try and match or overpower your opponent.
or
Magic Defense List (i.e. Lv1/2, Dispel Scroll, Feedback scroll, etc) - saved points go on Hero/Assassin to take on enemy mage or cause general havoc.
{ps Turning your opponents tooled up Wizard into a frog is priceless
}
Druchii Magic Tactics:
vs Light troops -
Fire is a great lore. Long range and high damage brings the pain from early on in the game. Also can hurt his heavies.
vs Heavy troops -
Metal is a no brainer. Having trouble cutting through Chaos Armour? Liquify it with the signature spell, turn it to rust, turn it to gold!...Lore of Metal really is your friend here. Also can protect your own troops.
All round choice -
Shadow with its speciality of buffing/debuffing works against all of light/heavy and monsters.
This Match Up:
So that's some general advice vs WoC, according to my experience. In regards to your game it looks like your opponents setup is a "Warrior Star" through the middle supported by marauders and flanked by the Dragon Ogre Lord.
I would swap the Murder banner for the Standard of Discipline on your Spears, give the Murder Banner to whatever elites you can field (Im not sure of what models are available to you). Drop the other 30 Spears for said elites.
Add one skirmish unit and think about an RBT or chariot for those extra 250 points (or use them on your elite unit and/or another small unit of elites).
I havent faced a Dragon Ogre Shaggoth before but it is hurtable at T5. I would probably attempt magic buffed shooting/debuffed stats, before engaging it in h-t-h though.
Good luck, and let us know how you get on