MTG Salvation

Hi! I would like some help on my UR delver deck: criticisms, ideas, improvements etc. All suggestions are appreciated!

Here's my decklist:
Creatures
4 Delver of Secrets
4 monastery swiftspear
4 young pyromancer
2 bedlam reveler

Instants
1 Electrolyze
4 Lightning Bolt
2 Vapor Snag
2 mana leak
2 spell snare
2 spell pierce
3 thought scour

Sorceries
4 serum visions
3sleight of hand
2pillar of flame


Land
5 island
4 mountain
4 shivan reef
4 flooded strand
2 steam vents

Thanks in advance!