Lifeline/Sneak deck needs YOUR help!!

[Daenen]

Here it is:

12 Mountains
5 Forests
4 Karpulsan Forests

4 Grim Monoliths
3 Ticking Gnomes
4 Lifeline

4 Sneak Attack
3 Gamble
4 Goblin Marshal
4 Keldon Champion

4 Fecundity
4 Deranged Hermit

I think that this deck could work, but it needs help. Tell me what you think. Thank you for your time.