I did a variant of this that I thought was pretty cool. My invasion troop transports were built big enough to hold one division each and equipped with lots of CIWS and 15 layers of armor. Their job was to draw fire and go head first into the invasion. To escort them was lots of small PD escorts and further back the dedicated AEGIS/AMM Cruisers.
I use a similar force - at the moment each
Rodger Young Divisional TT (80-100kt) with 22 battallions (1x Div HQ, 4x Bde HQ, 16xCombat Btn, 1xReplacement Btn) is escorted by 2x
Armour DE (10kt) with a pair of quadmount GC turrets and 4 x
Guardian CT(E) (5kt) with a single pairmount GC turrret and backed up with an
Archangel AMM armed CLE (20kt). They are accompanied (out of range) by the carriers with the actual assault ships (1000t dropship boats carrying 1 combat ready battalion, either 3 or 9 per carrier replacing the regular strikegroup), and usually additional fleet elements to reduce defences such as orbitals. Usually the GC escorts are sufficient on their own, as each of these groupings is capable of handling up to 112 inbounds per 5 sec turn, and usually there are at least two DivTTs assigned (sometimes more). If not the CLE can be used to divert some of the AMM fire.