A couple union supports I thought of ( somewhat focuses on ABCs but can be applied generically as well ).
Please leave your thoughts below. ?
Heavy Union Support Transport
Level 4 / Light / Machine / Union / Effect
1000 attack / 1000 defense
During the turn this card is Normal Summoned, you can Normal Summon 1 Union Monster in addition to your Normal Summon ( you can only gain this effect once per turn ). Once per turn, you can either: Target 1 Union Monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. If a Monster equipped with this card would be affected by an opponent's card effect, you can destroy this card instead of applying that effect.
Super Union Orgranizer
Link 2 / Light / Warrior / Link / Effect
Link Materials: 2 Monsters, including a Union Monster
Link Markers: Bottom Left, Bottom Right
1200 attack
Cannot be used as Link Material during the turn it is Link Summoned. If this card is Link Summoned: You can add 1 Union Monster from your Deck to your hand, then you can send 1 Normal Monster from your Deck to your GY. During your Main Phase: You can reveal 1 Union Monster in your hand; Special Summon 1 Monster from your hand or GY that can be equipped with the revealed Union Monster, then Equip the revealed Union Monster from your hand to the Summoned Monster ( Treat this equip as if it were done by the Monster's effect ). You can only use each effect of "Super Union Organizer" once per turn.