Oh, I forgot a couple of things @Stormy_Fairweather !
1)Stacking hullmods like Hardened Shields, Solar Shielding and Resistant Flux conduits just to name three instead of investing Ordinance Points into Capacitors will mean the ship will have less maximum flux capacity, which is really going to help the AI choosing to vent!
Now, threse 3 Hullmods are worth 60 ordinance Points in total on a Capital ship and only one of them is expensive enough to warrant imtegration via spending a story point, but they really, REALLY help in massively slowing hard flux build up and making venting a lot faster overall. I would consider investing into all three of them on either cruisers and capitals that have a lot of Ordinance Points for their class, like the Aurora or the Onslaught or the Paragon/Odissey!
2)Good medium to long range point defence will give a bigger window for the AI to vent. Some incoming Pilums sitting but outside Machinegun/Vulcan range can very well jeopardize the AI's attempts to vent. It's not all that necessary on most destroyers and cruisers, but anything generally too slow to properly disengage and vent should have good enough PD to carve itself a "safe haven" in which to vent!