Many LV3 digimon with "when played" effect is using in the deck, but the best LV3 card to free summon from Angewomon effect is Lucemon obviously, especially in the late time of the game because Lucemon can help to "Recovery+1". The option card Blinding Light, with only 1 copy in the deck, is used to reduce the security card to 3 (when the condition met to play 1 LV3 from hand) and gain 2 memory.
Yellow can widen the board in 2 or 3 turns if the yellow player able to control the game. To do that, yellow should evolve a LV5 digimon into LV6 Kentaurosmon in next turn to trigger Kentaurosmon "when digivolving" effect: up-to 5 opponent's digimon get "SecurityAttack-2" in opponent's next turn. With this strategy, if opponent don't have tactic to destroy your LV5 or other digimon in the battle then the game would be your favor.
This deck has only 2 copies of Kentaurosmon in the deck, but don't worry, he is a Holy Warrior type digimon (same type with Crusadermon), so we can use Kotemon and Gladimon to find him in Security Stack or reveal from deck to put to hand.