mellored
Legend
Probably better to make it a new class than use the warlock.I think it is possible to replicate 4e with the 5e SRD. Just base everyone at the warlock. Invocation substitute for powers. Pact magic slots can be used to fuel the encounter powers.
Use the heroic rest options with second wind on top.
Call it AEDU 4Ever
Level 1.
Pick a role
Leader: healing word 1/encounter.
Defenders: bonus action mark.
Striker: +1d4 damage.
Controler: push someone on a hit
Pick a power source, and select an at-will power from it.
Level 2: Select an encounter and daily power. Each has prerequisites, and scales automatically.
Level 3 is your
Level 4: feat.
Level 5: select another encounter. Expand your roll feature.