I've said it before, and I'll say it again: there is a huge difference between being a competent provider on a BLS truck in a 911 system, and being a competent paramedic helper. different expectations, different equipment, different objectives.
Couple that with the fact that your primary purpose is IFT, and it's even more complicated.
How do you clear attendants to work IFT solo? do you have a credentialing process, or is it just two shifts with an FTO and release to the wolves?
What is your ratio of IFT calls to 911? Making the assumption that it's 90% IFT and 10% 911, what do you think would be the best way to train all staff on rarely used skills?
How many poor clinical providers do you have working for your company? you know the type, the people that are good at holding grandma's hand and making her feel comfortable, but when she passes out, they will panic and not know what do to? how many providers would you trust to assess and treat your parents if they had chest pains? When I worked IFTs, there were some awesome people that I wouldn't want to trust my worst enemy.
The first thing I would recommend you do is to establish a baseline of your current training levels, and that will require you to evaluate your staff. run a simulated call, in private, with formal evaluators. use the NREMT paperwork if you need a checklist of things to look for. maybe even invite the ALS people so they can give an outside perspective. See where your weaknesses are and what you need to work on.
Once you have your crews comfortable with BLS stuff (patient assessment, BLS interventions), then reach out to your local ALS provider, and involve them in the ALS equipment. Review how to use their monitor (I'll be honest, I can work a lifepak 12 and 15, but if you throw a zoll at me, it's pretty embarrassing / think monkey and a football), how to start an IV drip, what the IV colors are, what the ALS expectations are of BLS personnel, etc. do they know how to set up an entitle system, and connect it to the monitor? It's outreach for the ALS agency, and it's viewed as a good thing when its done proactively.
Some might argue that 90% of the time, 911 and IFT are pretty much the same; but it's that 10% where the differences are significant, and that is why you should be training on those high-risk rarely used situations.