I know very little of the old strategy, but I will say this:
Monoliths, though slightly less durable than before, are far cheaper points wise. However, they are now subject to the same hazards of deepstrikes as most other units, when the 3rd ed rules allowed them much more flexibility in that category. Also, the new gateway weapon is also viable for heavy troops, when gauss and particle-whip aren't enough.
My strategy? Tell me, what can possibly be better than a Monolith?
Give up?
Two!
Set one in reserve, the other on the table at game start. The first one draws enough firepower to leave much of your army unscathed. And that only increases once you manage to DS your second one in. Having Troops, Elites, Scarabs, etc in reserve to deploy via either is also fairly decent.
Granted, this is not what you call a cheap strategy. This is the Best Defense is Good Offense. Make sure they know you have not one, but two arm14, dakka firing bullet magnets on the field.
And you're not afraid to use them.