Its less deep than Magic, but the gameplay is solid, and the core mechanics provide a lot of opportunity for future card designs
Torens, Fist of the Angels does two things well - he creates creature tokens and he puts +1/+1 counters on creatures
Spiders-Man, Heroic Horde can come down early for just 2 mana and generate tokens and life if you cast it with web-slinging
Picking up another Engineered Explosives stand-in will help there, and Blast Zone contributes to Amulet Titans ability to find answers to absolutely every problem given enough time and mana
If you prefer your defenses to come in the form of surprise spells, you could replace Aven Courier and Floriferous Vinewall with Simic staples such as Rapid Hybridization , Krosan Grip , Nature's Claim , or counterspells like Negate or Swan Song