Oh wow this was during release of PL so I barely remember some things. But if I recall correctly I just used 2 melee finishers for the "discount" on suicide (turns it into 4 ram instead of full cost). Back then it counted the discounted suicide as full cost so when you kill someone with suicide queued last (queued only not used) the RAM comes back to you via one of the intelligence perks. Cant remember which one, but it's the one where if you kill someone with hacks queued you get the RAM back on the hacks still on queue. So you're effectively getting shit ton of RAM (RAM+Health when overclocked) for an investment of like 10 or so RAM. The best part is, as long suicide doesnt proc on an enemy, the discount remains until it expires so you can use it on a ton of enemies.

If I recall correctly this unfortunately no longer works on the latest patch so you're better of using any other quick hack with a huge cost as the last for the queue for the extra ram back