Skaven Army 2500pts

This is a skaven army that i frequently use against my three cousins that use lizardmen, empire and orcs and goblins and it has walloped them all although small for a skaven army it is qite powerful.

Please send me any advice on how to make this list more tournament affective.

Warlord with heavy armour, enchnted shield, cursed blade of delirium and bands of power.

Chieftan with heavy armour, batttle standard and sacred standard of the horned rat.

Warlock engineer with warp blades, upgraded warp energy condenser, supercharged warp power accumulator, dispel scroll and storm daemon.

Assassin with warpstone amulet

20 clanrats with spears, rattling gun and full command

20 clanrats with rattling gun and full command

18 stormvermin with shields, full command and warbanner

4 plague rat swarms

3 giant rat packs

20 nightrunners additional hand weapons, nightleader

2 units of 20 clanrat slaves with musician and champion

2 poisoned wind globaiders

20 plague monks, with additional hand weapons, full command and umbranner

4 rat ogres

dogs of war giant