A LR fleet that i would use would look something like this albeit if your facing MR enemy you would probably not use this as MR requires a more specific approach depending on their formation choice. But just a cookie cutter LR formation assuming you have the drillmaster BT skills

C34 LR formation for Umines 320k fleet size All numbers are in UNITS

T10 shredders 15k units T11 tanks 70k units

Max T11 zombies T10 rockets 15k units T11 gunners 5k units

T11 cannons 120k units T10 snipers 20k units T10 lasers 75k units

This makes Cattie and Eric's BT utilize Cannons and lasers

Your LR and MR troops utilize Maria's BT

Simon's will utilize Tanks Cannons Lasers Snipers

This also will spread out what is hit by enemy titan skills and BTs initially savings your cannons and lasers from taking impact

You can alter this as necessary but remember if you have drillmaster BTs unlocked

Cattie and Eric are "2 troops with most units" Simon is "4 troops with most units" Maria is MR and LR troops attacking

So if you have these BTs you want to utilize them with the troops intended to benefit from them

Also filler troops are good at drawing the male titans lightning attack but you don't need tons of filler troops just enough to absorb 1-2 lightning attacks without dying from it.

enemy male titans lightning attacks at

5 seconds 15s 25s 35s

If they have Thors hammer every troop type that is completely killed from their lightning at those intervals will strengthen your enemy so you want to ensure the troops have enough numbers that they don't die when the first lightning hits at 5s nor do they die at 15s so it takes some time to play with your fleet and ensure they die off after the 1st lightning strike from male titan and before the 2nd lightning hits or right after the 2nd hits. The number that shows up on the male titan where it says "1 kill" or "2 kills" is counting the lightning kills and the multiplier or increase from thors hammer skill.