I've had this deck for some time now and its pulled me out of some rough spots but I also want to improve it as well so input would ne nice

Monsters

3x Mermail Megaloabyss
1x Mermail Abyssturge
2x Mermail Abysspike
3x Mermail Abysslinde
2x Mermail Abyssgunde
3x Mermail Abysshilde
3x Deep Sea Diva
2x Atlantean Armed Soldier
2x Atlantean Marksmen

Magic

1x Heavy Storm
1x Dark Hole
3x Salvage
1x Monster Reborn
2x Pot of Duality

Trap

3x Abyssphere
2x Torrential Tribute
1x Solemn Judgement
1x Mirror Force
2x Compulsory Evacuation Device
2x Bottomless Trap Hole

Side Deck

2x Solemn Warning
2x Abysscale Kraken
2x Effect Veiler
2x Dimensional Prison
2x Maxx C
2x Thunder King Rai-Oh

Synchro/ XYZ

1x T.G. Hyper Liberian
1x Scrap Dragon
1x Stardust Dragon
1x Black Rose Dragon
1x Ally of Justice Catastor
1x Gaia Knight, The Force of Earth
1x Gungnir Dragon of the Ice Barrier
1x Number 11: Big Eye
1x Wind Up Zenmaines
1x Number 39: Utopia
1x Snowdust Dragon
1x Number 17: Leviathan Dragon
1x Mermail Gaioabyss
1x Gachi Gachi Gantetsu
1x Maestroke the Symphony Djinn

I would take out 1 Abysspike, one compuls, and the reborn (really no point in it when you have salvage).

After that i would add the two Solemn warning, and put in another Armed Soldier (it's not very good at 2 when you have a LOT of targets to kill, marksman at 2 is just fine). I run 3 of both, but that's just a personal pref.