Dread Mob list advice

I'm trying to figure out a dread mob list that can compete with local meta, which is space marines, necrons, or chaos marines. I had one competitive game vs nids, but get stomped every time by marine lists. The last game was vs salamanders, so I was not too shocked. My list had 6 kans, morka, gorka, deff dread with 3 skorchas, big mek with shokk attack, 2 meks, 10 nobz, warboss, 33 gretchin, 10 lootas, beast boss on squig, and unit of squighog boyz, thinking this might help with anti-vehicle. The squighogs where a big disappointment vs land raider. Maneuver was difficult with that list. After that, I thought maybe a mek and body heavy dread mob list might do better vs power armor opponents who need dey teef kicked in. Thoughts are to push the button with everyone and push it to hazardous often. Appreciate suggestions.

Here is the list:

Char1: 1x Zodgrod Wortsnagga (80 pts): Da Grabzappa, Squigstoppa
Char2: 1x Big Mek (70 pts): Kustom mega-blasta, Power klaw
Char3: 1x Big Mek (70 pts): Kustom mega-blasta, Power klaw
Char4: 1x Big Mek in Mega Armour (105 pts): Grot oiler, Kustom force field, Kustom mega-blasta, Power klaw
Enhancement: Smoky Gubbinz (+15 pts)
Char5: 1x Big Mek with Shokk Attack Gun (65 pts): Close combat weapon, Shokk attack gun
Char6: 1x Big Mek with Shokk Attack Gun (75 pts): Close combat weapon, Shokk attack gun
Enhancement: Gitfinder Gogglez (+10 pts)

20x Boyz (160 pts)
• 1x Boss Nob: Big choppa, Slugga
• 19x Boy: 19 with Choppa, Slugga
22x Gretchin (80 pts)
• 20x Gretchin: 20 with Close combat weapon, Grot blasta
• 2x Runtherd: 2 with Grot-smacka, Slugga
11x Gretchin (40 pts)
• 10x Gretchin: 10 with Close combat weapon, Grot blasta
• 1x Runtherd: Grot-smacka, Slugga
11x Gretchin (40 pts)
• 10x Gretchin: 10 with Close combat weapon, Grot blasta
• 1x Runtherd: Grot-smacka, Slugga

10x Lootas (100 pts)
• 8x Loota: 8 with Close combat weapon, Deffgun
• 2x Spanner: 2 with Close combat weapon, Kustom mega-blasta
10x Lootas (100 pts)
• 8x Loota: 8 with Close combat weapon, Deffgun
• 2x Spanner: 2 with Close combat weapon, Kustom mega-blasta
6x Meganobz (210 pts)
  1 with Killsaw, Kombi-weapon
  1 with Killsaw, Kombi-weapon
  1 with Killsaw, Kombi-weapon
  1 with Killsaw, Kombi-weapon
  1 with Killsaw, Kombi-weapon
  1 with Killsaw, Kombi-weapon
10x Nobz (210 pts): 2x Ammo Runt
• 1x Boss Nob: Power klaw, Slugga
• 9x Nob: 9 with Power klaw, Slugga
1x Deff Dread (120 pts): Stompy feet, Dread klaw, Skorcha, Skorcha, Skorcha
1x Deff Dread (120 pts): Stompy feet, Dread klaw, Rokkit launcha, Rokkit launcha, Rokkit launcha
3x Deffkoptas (90 pts): 3 with Kopta rokkits, Slugga, Spinnin’ blades
3x Killa Kans (125 pts): 3 with Kan klaw, Rokkit launcha
3x Killa Kans (125 pts): 3 with Kan klaw, Rokkit launcha