Str/Int hybrids are by far the easiest class to play. The first character uses divine light or/and lower or nullify resistances. The next one low level witchcraft spells like blind. The last two deal damage.
This is just one example. You might need a tiny bit more time to kill actually, that is just it. Strength should only be slightly priorized to int, 1 or 2 talent points need to be sacrifized at the demon in Homestead.
I am just (for example) running a level 21 charcter with 20 strength, 12 int, something like 14 speed. A LOT of that coming from gear. 1H/shield combination for blocking, witchcraft and 1st level geomancer for Crowd Control.
No need to change anything, these guys are downright amazing if played right. Especially in a tank role they are (nearly) decoupled from strength, I can easily imagine to play a character with reversed stats (my hybrids so far got strength first).
Regards,
Thorsten