I've had the reanimators in Stop that Tank for awhile now and in the war & love update Valve removed a check so medics can heal them without being in MvM and they did the same for the cancel hud for anyone wondering.
You don't have to use a detour to stop the player from respawning, just use this code whenever you create the entity_revive_marker:
Code:
SetEntDataEnt2(client, FindSendPropInfo("CTFPlayer", "m_nForcedSkin")+4, iMarker);
There are more problems with the shields like the marker bubble showing for everyone on the server and an instant revive bug Valve hasn't fixed. When I release it someone can use my fixes it if it'll help.